Tommi Varis

Research output

Research output per year 2000 2006 2007 2008 2010 2013 2014 2024

• 44 Conference contribution
• 44 Article
• 3 Other conference contribution
• 1 Doctoral thesis

Research output per year

Research output per year

Search results

• 2022

  On the applicability of iron-based alloy coatings to different wear conditions

  Varis, T., Lagerbom, J. P., Suhonen, T., Terho, S., Laurila, J. & Vuoristo, P., 4 May 2022, Thermal Spray: International Thermal Spray. ASM International, p. 543-552 10 p. (Proceedings of the International Thermal Spray Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  Open Access

  • Fe-based Coating 100%
  • Wear Conditions 100%
  • Iron-based Coating 100%
  • WC-Co 100%
  • Applicability 100%
• 2019

  Corrosion properties of thermally sprayed bond coatings under plasma sprayed chromia coating in sulfuric acid solutions

  Vuoristo, P., Varis, T., Meschini, D., Bolelli, G. & Lusvarghi, L., May 2019, International Thermal Spray Conference and Exposition, ITSC 2019: New Waves of Thermal Spray Technology for Sustainable Growth. Azarmi, F., Lau, Y., Veilleux, J., Widener, C., Toma, F., Koivuluoto, H., Balani, K., Li, H. & Shinoda, K. (eds.). ASM International, p. 923-930 8 p. (Proceedings of the International Thermal Spray Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Plasma Spraying 100%
  • Corrosion Properties 100%
  • Thermally-sprayed 100%
  • Sulfuric Acid Solution 100%
  • Bond Coating 100%
• 2014

  Material challenges in the manufacturing of tailored structures with direct write technologies

  Metsä-Kortelainen, S., Ronkainen, H., Varis, T., Ruusuvuori, K., Roozeman, R., Vehmas, T., Kupiainen, V., Ahlroos, T., Lagerbom, J. & Suhonen, T., 2014, Materials Challenges and Testing for Manufacturing, Mobility, Biomedical Applications and Climate. Udomkichdecha, W., Böllinghaus, T., Manonukul, A. & Lexow, J. (eds.). Springer, p. 57-66

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Direct Ink Writing 100%
  • Direct Writing Technology 100%
  • Tailored Structure 100%
  • Thermal Spray 100%
  • Surface (Surface Science) 33%

• Multiscale modelling of microstructural defects and influence on mechanical properties and wear resistance of thermal spray coatings

  Laukkanen, A., Varis, T., Suhonen, T., Metsäjoki, J., Andersson, T. & Laitinen, T., 2014, ITSC 2014 Proceedings CD-ROM. p. 568–571

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• The impact and sliding wear performance of thermal spray HVAF thick carbide coatings on steel substrates

  Waudby, R., Suhonen, T., Varis, T. & Holmberg, K., 2014, ITSC 2014 Proceedings CD-ROM. p. 279–284

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2013

  A material solution against fireside chloride corrosion

  Yli-Olli, S., Suhonen, T., Virta, J., Holmström, S., Varis, T., Tuurna, S. & Kinnunen, T., 2013, Baltica IX. International Conference on Life Management and Maintenance for Power Plants. Auerkari , P. & Veivo, J. (eds.). p. 513-526

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• High velocity impact testing of thermal spray hard carbide coatings on steel substrates

  Waudby, R., Varis, T., Suhonen, T., Holmberg, K., Apostol, M., Lindroos, M. & Kuokkala, V.-T., 2013, Proceedings of 5th World Tribology Congress WTC 2013, Torino, Italy, September 8 - 13, 2013. p. 1-4 4 p. (World Tribology Congress).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  2 Citations (Scopus)

• Materials for electronics by thermal spraying

  Ronkainen, H., Kanerva, U., Varis, T., Ruusuvuori, K., Turunen, E., Peräntie, J., Putaala, J., Juuti, J. & Jantunen, H., 2013, Physical and Numerical Simulation of Materials Processing VII. Vol. 762. p. 451-456 6 p. (Materials Science Forum; vol. 762).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Aluminum Oxide 100%
  • Thermal Spraying 100%
  • Materials for Electronics 100%
  • Al2O3 100%
  • Thermal Spray 75%
  2 Citations (Scopus)
• 2012

  High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt

  Oksa, M., Tuurna, S. & Varis, T., 2012, European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control .

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  • Hot Corrosion Resistance 100%
  • High Temperature Corrosion 100%
  • High-velocity Oxy-fuel Coating 100%
  • LiCl-KCl 100%
  • Na2SO4 Salt 100%

• HVOF process control enabling strategies

  Ghabchi, A., Varis, T., Holmberg, K. & Sampath, S., 2012, International Thermal Spray Conference and Exposition, ITSC 2012 - Air, Land, Water and the Human Body: Thermal Spray Science and Applications. ASM International, p. 465-471 7 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Process Control 100%
  • In-flight Particle 100%
  • Enabling Strategies 100%
  • HVOF Process 100%
  • Particle Velocity 100%

• Optimizing NiCr thermal spray coating with process map methodology for high temperature power plant boiler application

  Oksa, M., Varis, T., Suhonen, T. & Jokipii, M., 2012, ITSC 2012 Proceedings. Lima, R. S., Agarwal, A., Hyland, M. M., Lau, Y.-C., Li, C.-J., McDonald, A. & Toma, F.-L. (eds.).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2011

  Gas atomized thermal spray powders of various metals and alloys

  Lagerbom, J., Ritvonen, T., Suhonen, T. & Varis, T., 2011, Proceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2011. European Powder Metallurgy Association (EPMA), Vol. 2.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Thermal Spray 100%
  • Gas-atomized 100%
  • Thermal Spraying 100%
  • Atomizer Nozzle 100%
  • Particle Size 50%

• Thermally sprayed coatings protecting biomass fired FB boiler

  Oksa, M., Varis, T., Suhonen, T., Ruusuvuori, K., Tuurna, S. & Holmström, S., 2011, EUROCORR 2011 Proceedings (Book of abstracts, and DVD) .

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2010

  Cracking behaviour of thick composite coatings under scratch testing

  Ghabchi, A., Helle, A., Rombouts, M., Holmberg, K., Rissa, K., Varis, T. & Lepistö, T., 2010, Proceedings of Nordtrib 2010: 14th Nordic Symposium on Tribology: Storforsen, Sweden 8.-11.6.2010. Luleå University of Technology, p. 1-8 8 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Composite Coating 100%
  • Scratch Test 100%
  • Cracking Behavior 100%
  • Binder 100%
  • Thick Composites 100%

• Fireside corrosion of superheater materials in oxyfuel combustion

  Pohjanne, P., Yli-Olli, S., Auerkari, P., Tuurna, S., Jauhiainen, P., Turunen, E., Varis, T., Ruusuvuori, K. & Mäkipää, M., 2010, Proceedings of the Corrosion 2010 Conference and Expo. p. 2438-2451

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• High temperature corrosion of thermally sprayed NiCr- and amorphous Fe-based coatings covered with a KCl-K2SO4 salt mixture

  Varis, T., Bankiewicz, D., Yrjas, P., Suhonen, T., Tuurna, S., Ruusuvuori, K., Holmström, S. & Salonen, J., 2010, Proceedings of 9th Liège Conference on Materials for Advanced Power Engineering. p. 846-856

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Managing corrosion in biomass boilers: benefits and limitations of coatings

  Tuurna, S., Varis, T., Ruusuvuori, K., Holmström, S., Salonen, J., Auerkari, P., Yrjas, P., Kinnunen, T., Finne, R., Nupponen, M., McNiven, U., Ahonen, H. & Kapulainen, A., 2010, Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2. p. 22-36

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  • Boiler 100%
  • Corrosion 100%
  • Fluidised Bed 100%
  • Biomass Boiler 100%
  • Limitations 100%

• MnCo2O4 spinel chromium barrier coatings coatings for SOFC interconnect by HVOF

  Lagerbom, J., Varis, T., Puranen, J., Pihlatie, M., Himanen, O., Sarinen, V., Kiviaho, J. & Turunen, E., 2010, Proceedings of 9th Liège Conference on Materials for Advanced Power Engineering.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Nano-sized and sub-micron carbide powders for thermal spraying

  Kanerva, U., Oksanen, J., Suhonen, T., Varis, T., Liu, X. W., Ge, Y., Ritvonen, T., Söderberg, O., Turunen, E. & Hannula, S. P., 2010, Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010. European Powder Metallurgy Association (EPMA), (Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010; vol. 1).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Submicron 100%
  • Nanosize 100%
  • Carbides 100%
  • Thermal Spraying 100%
  • Jet Spray 100%
  1 Citation (Scopus)
• 2009

  Behavior of HVOF WC-10Co4Cr Coatings with Different Carbide Size in Fine and Coarse Particle Abrasion

  Ghabchi, A., Varis, T., Turunen, E., Suhonen, T., Liu, X. & Hannula, S.-P., 2009, Proceedings of the 2009 International Thermal Spray Conference, Las Vegas, Nevada. Marple, B. R., Hyland , M. M., Lau, Y.-C., Li, C.-J., Lima , R. S. & Montavon, G. (eds.). p. 415-419

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  3 Citations (Scopus)

• Thermally-Sprayed BaCoTiFe10O19 Layers as Microwave Absorbers

  Bolelli, G., Lusvarghi, L., Lisjak, D., Hujanen, A., Lintunen, P., Kanerva, U., Varis, T., Begard, M., Richardt, K., Schläfer, T., Bobzin, K. & Pasquale, M., 2009, Proceedings of the International Thermal Spray Conference 2009, Las Vegas, Nevada. Marple, B. R., Hyland, M. M., Lau, Y.-C., Li , C.-J., Lima, R. S. & Montavon, G. (eds.). p. 628-633

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  1 Citation (Scopus)
• 2008

  Improving the properties of HVOF- sprayed Cr203 by nanocomposite powders

  Varis, T., Knuuttila, J., Suhonen, T., Kanerva, U., Silvonen, J., Leivo, J. & Turunen, E., 2008, Thermal Spray Crossing Borders. Lugscheider, E. (ed.). p. 452-455

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Modelling the effect of microstructure on mechanical properties of HVOF sprayed WC-CoCr coatings

  Suhonen, T., Varis, T., Turunen, E., Liu, X., Ge, Y., Söderholm, O. & Hannula, S.-P., 2008, World Materials Research Institute Forum, Workshop for Young Scientists (1st International Workshop), National Institute for Materials Science (NIMS). p. 1-14

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

• Phase stability and structure of conductive perovskite ceramic coatings by thermal spraying

  Lagerbom, J., Nikkilä, A.-P., Kylmälahti, M., Vuoristo, P., Kanerva, U. & Varis, T., 2008, Thermal spray crossing borders. Lugscheider, E. (ed.). p. 1103–1108

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Residual stresses in HVOF- and APS-Deposited Al2O3 and Cr2O3 coatings

  Giovanni, B., Lusvarghi, L., Varis, T., Turunen, E., Leoni, M., Scardi, P., Azanza Ricardo, C. L. & Barletta, M., 2008, Proceedings of the International Thermal Spray Conference and Exposition, ITSC 2008: Thermal Spray Crossing Borders. Lugscheider, E. (ed.). p. 990-995

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• The Effect of Annealing on the Formation of Jexaferrite Absorber Coatings Produced by Thermal Spraying Technologies

  Lisjak, D., Lintunen, P., Varis, T., Hujanen, A., Bobzin, K., Bolelli, G., Richarde, K., Begard, M., Lusvarghi, L., Pasquale, M., Olivetti, E. S., Drofenik, M. & Schkäfer, T., 2008, 10th International Conference on Ferrites ICF10, ICF 10.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2007

  Coating integrated optical fibres for monitoring of boiler heat transfer surfaces

  Sandlin, S., Hokkanen, A. & Varis, T., 2007, BALTICA VII - Life Management and Maintenance for Power Plants. 247 ed. Vol. 2. p. 164-179 16 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Boiler 100%
  • Heat Transfer Surface 100%
  • Optical Fiber 100%
  • Integrated Optical 100%
  • Fiber Optics 100%

• Hot corrosion and erosion resistance of new coating alloys for biomass and waste boiler heat transfer surfaces

  Yli-Olli, S., Tuurna, S., Oksa, M., Turunen, E. & Varis, T., 2007, BALTICA VII - Life Management and Maintenance for Power Plants. 247 ed. Vol. 2. p. 109-122 14 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Boiler 100%
  • Erosion Resistance 100%
  • Hot Corrosion Resistance 100%
  • Corrosion Test 100%
  • Heat Transfer Surface 100%

• Nanostructured ceramic HVOF coatings for improved protection

  Turunen, E., Kanerva, U., Varis, T., Knuuttila, J., Leivo, J. & Silvonen, J., 2007, Thermal Spray: Global Coating Solutions. Marple , B. R., Hyland, M. M., Lau, Y.-C., Li, C.-J., Lima, R. S. & Montavon, G. (eds.). p. 484-488

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2006

  Combination of protective coating and temperature monitoring in boilers

  Oksa, M., Mustala, S., Sandlin, S., Turunen, E., Varis, T. & Tuurna, S., 2006, Applied Material Research at VTT. 244 ed. VTT, p. 166-176 11 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Boiler 100%
  • Protective Coatings 100%
  • Temperature Monitoring 100%
  • Protective Coating 100%
  • Steam Generator 100%

• Development of nanostructured Al2O3-NiHVOFcoatings

  Hannula, S.-P., Turunen, E., Keskinen, J., Varis, T., Falt, T., Gustafsson, T. E. & Nowak, R., 2006, SCIENCE OF ENGINEERING CERAMICS III. Ohji, T., Sekino, T. & Niihara, K. (eds.). Trans Tech Publications Ltd, p. 539-544 6 p. (KEY ENGINEERING MATERIALS; vol. 317-318).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Nanostructures 100%
  • Aluminum Oxide 100%
  • Al2O3 Coating 100%
  • Protective Properties 100%
  • HVOF Coating 100%

• Improved Mechanical Properties by Nanoreinforced HVOF sprayed Ceramic Composite Coatings

  Turunen, E., Varis, T., Keskinen, J., Fält, T. & Hannula, S.-P., 2006, Proceedings of the International Thermal Spray Conference: Building of 100 years of success. Marple, B. R., Hyland, M. M., Lau, Y.-C., Lima, R. S. & Voyer, J. (eds.).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Improved mechanical properties by nanoreinforced HVOF-sprayed ceramic composite coatings

  Turunen, E., Varis, T., Gustafsson, T. E., Keskinen, J., Lintunen, P., Lintula, P. & Hannula, S.-P., 2006, Applied Material Research at VTT. Ritschoff, A., Koskinen, J. & Paajanen, M. (eds.). Technical Research Centre of Finland, p. 188-199 12 p. (VTT SYMPOSIA).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Coating Properties 100%
  • Fracture Toughness 100%
  • Improved Mechanical Properties 100%
  • Ceramic Composite Coating 100%
  • Nano-reinforcing 100%

• Process optimization for nanostructured HVOF-sprayed Al2O3-based ceramic coatings

  Turunen, E., Varis, T., Gustafsson, T. E., Keskinen, J., Lintunen, P., Falt, T., Nowak, R. & Hannula, S.-P., 2006, SCIENCE OF ENGINEERING CERAMICS III. Ohji, T., Sekino, T. & Niihara, K. (eds.). Trans Tech Publications Ltd, p. 545-548 4 p. (KEY ENGINEERING MATERIALS; vol. 317-318).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Nanostructures 100%
  • Ceramic Coating 100%
  • Process Optimization 100%
  • High Velocity Oxy-fuel 100%
  • Al2O3 Ceramic 100%

• Wear behaviour of APS and HVOF sprayed ceramic coatings

  Bolelli, G., Cannillo, V., Turunen, E., Varis, T., Fält, T. & Hannula, S.-P., 2006, Proceedings of the International Thermal Spray Conference, ITSC 2006: Building on 100 Years of Success. Marple, B. R., Hyland, M. M., Lau, Y.-C., Lima, R. S. & Voyer, J. (eds.).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  • Cohesion 100%
  • Plasma Spraying 100%
  • Ceramic Coating 100%
  • Wear Behavior 100%
  • Aluminum Oxide 100%
• 2005

  Corrosion resistance of HVOC coatings in a biofuel boiler plant

  Oksa, M., Kärki, J., Varis, T. & Turunen, E., 2005, Book of abstracts and Proceedings (CD-ROM).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Corrosion Resistance 100%
  • Biofuel 100%
  • Thermal Spray Coatings 100%
  • Boiler Plant 100%
  • Superheater 100%

• Nanoreinforced HVOF - sprayed ceramic coatings

  Turunen, E., Varis, T., Hannula, S.-P., Keskinen, J., Lintunen, P. & Fält, T., 2005, Proceedings of the International Thermal Spray Conference, ITSC 2005: Thermal Spray Connects: Explore its Surfacing Potential. Lugscheider, E. (ed.).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2004

  Nanoreinforced HVOF-sprayed ceramic coatings

  Turunen, E., Varis, T., Hannula, S.-P., Keskinen, J., Fält, T. & Nowak, R., 2004, Thermal Spray Solutions Advances in Technology and Application: International Thermal Spray Conference ITSC 2004 .

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• Process optimization for nanostructured HVOF-sprayed Al2O3-based ceramic coatings

  Oksa, M., Turunen, E. & Varis, T., 2004, Thermal Spray Solutions Advances in Technology and Application.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

• The on-site manufacturing of thermally sprayed coatings

  Turunen, E., Varis, T. & Vesterlund, I., 2004, Proceedings of the International Thermal Spray Conference. p. 66-69 4 p. (Proceedings of the International Thermal Spray Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • Thermal Spray Coatings 100%
  • Off-site Manufacturing 100%
  • Real Life 100%
  • Pretreatment 100%
  • Grinding (Machining) 100%
• 2003

  Spray parameter optimisation and tribological properties of thermally sprayed quasicrystalline and partially quasicrystalline coatings

  Turunen, E., Varis, T., Vierimaa, K. & Hannula, S.-P., 2003, Proceedings of the Estonian Academy of Sciences, Engineering. No.4 ed. Vol. 9. p. 293-303

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific
• 2002

  Thermal management materials in electronics

  Kolari, M., Varis, T., Rajamaki, E. & Keskinen, J., 2002, Mechanics for electronics. Eklund, P. (ed.). Technical Research Centre of Finland, p. 27-38 12 p. (VTT SYMPOSIA; vol. 223).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  • Heat Conduction 100%
  • Thermal Management Materials 100%
  • Conductive 100%
  • Ceramic Coating 100%
  • Heat Conductivity 75%
• 2001

  Mechanical Properties of Thermal Spray Coatings

  Varis, T., Rajamäki, E. & Korpiola, K., 2001, Proceedings of the International Thermal Spray Conference. p. 993-997 5 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific

  • Bulk Material 100%
  • Test Condition 100%
  • Ultimate Tensile Strength 100%
  • Loading Condition 100%
  • Thermal Stress 100%
  7 Citations (Scopus)
• 2000

  Using IR-thermography as a quality-control tool for thermal spraying in the aircraft industry

  Jokinen, P., Kauppinen, T., Varis, T. & Korpiola, K., 2000, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4020. p. 232-237 6 p. (Proceedings of SPIE - The International Society for Optical Engineering).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

  • IR Thermography 100%
  • Thermal Spraying 100%
  • Quality Control Tools 100%
  • Aircraft Industry 100%
  • Quality Control 100%
  1 Citation (Scopus)