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Influence of Microstructure on Thermal Properties of Columnar Axial Suspension Plasma Sprayed Thermal Barrier Coatings
Högskolan Väst, Institutionen för ingenjörsvetenskap, Forskningsmiljön produktionsteknik(PTW). (PTW)ORCID-id: 0000-0003-1897-0171
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avd för maskinteknik. (PTW)ORCID-id: 0000-0003-0209-1332
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avd för tillverkningsprocesser. (PTW)ORCID-id: 0000-0002-9578-4076
Högskolan Väst, Institutionen för ingenjörsvetenskap, Forskningsmiljön produktionsteknik(PTW). (PTW)ORCID-id: 0000-0001-7787-5444
Vise andre og tillknytning
2015 (engelsk)Inngår i: Proceedings of the International Thermal Spray Conference: International Thermal Spray Conference and Exposition, ITSC 2015; Long Beach; United States; 11 May 2015 through 14 May 2015 / [ed] A. McDonald, A. Agarwal, G. Bolelli, A. Concustell, Y.-C. Lau, F.-L. Toma, E. Turunen, C. Widener, ASM International, 2015, s. 498-505Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Suspension Plasma Spraying is a relatively new thermal spraying technique to produce advanced thermal barrier coatings. This technique enables the production of a variety of structures from highly dense, highly porous, segmented or columnar coatings. In this work a comparative study is performed on six different suspension plasma sprayed thermal barrier coatings which were produced using axial injection and different process parameters. The influence of coating morphology and porosity on thermal properties was of specific interest. Tests carried out include microstructural analysis with SEM, phase analysis using XRD, porosity calculation using Archimedes experimental setup, pore distribution analysis using mercury infiltration technique and thermal diffusivity/conductivity measurements using laser flash analysis. The results showed that columnar and cauliflower type coatings were produced by axial suspension plasma spraying process. Better performance coatings were produced with relatively higher overall energy input given during spraying. Coatings with higher energy input, lower thickness and wider range of submicron and nanometer sized pores distribution showed lower thermal diffusivity and hence lower thermal conductivity. Also, in-situ heat treatment did not show dramatic increase in thermal properties.

sted, utgiver, år, opplag, sider
ASM International, 2015. s. 498-505
Emneord [en]
Thermal spray, Suspension Plasma Spraying, axial injection, MIP, porosity, nano pore, thermal conductivity
HSV kategori
Forskningsprogram
TEKNIK, Produktions- och materialteknik; Produktionsteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-7726DOI: 10.13140/RG.2.1.1494.1288Scopus ID: 2-s2.0-84962786683ISBN: 9781510811546 (digital)OAI: oai:DiVA.org:hv-7726DiVA, id: diva2:820011
Konferanse
International Thermal Spray Conference and Exposition, ITSC 2015; Long Beach; United States; 11 May 2015 through 14 May 2015
Tilgjengelig fra: 2015-06-11 Laget: 2015-06-11 Sist oppdatert: 2018-08-12bibliografisk kontrollert

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