Axial Plasma Spraying of Mixed Suspensions: A Case Study on Processing, Characteristics, and Tribological Behavior of Al2O3-YSZ Coatings

Axial Plasma Spraying of Mixed Suspensions : A Case Study on Processing, Characteristics, and Tribological Behavior of Al2O3-YSZ Coatings

Goel, Sneha, 1993- (author): Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW

Björklund, Stefan, 1969- (author): Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW

Curry, Nicholas, 1984- (author): Treibacher Ind AG, A-9330 Althofen, Austria.,Treibacher Industrie AG, Althofen, 9330, Austria (AUT)

Govindarajan, Sivakumar (author): Int Adv Res Ctr Powder Met & New Mat, Hyderabad 500005, India.,International Advanced Research Center for Powder Metallurgy and New Materials, Hyderabad, 500 005, India (IND)

Wiklund, Urban (author): Uppsala universitet,Tillämpad materialvetenskap,Uppsala University, Applied Materials Science, Uppsala, 75121, Sweden

Gaudiuso, Caterina (author): Univ Bari, Phys Dept, Via Amendola 173, I-70126 Bari, Italy.,University of Bari, Physics Department, via Amendola 173, Bari, 70126, Italy (ITA)

Joshi, Shrikant V., 1960- (author): Högskolan Väst,Forskningsmiljön produktionsteknik(PTW),PTW

(creator_code:org_t)

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Abstract Subject headings

Thermal spraying deploying liquid feedstock offers an exciting opportunity to obtain coatings with characteristics vastly different from those produced using conventional spray-grade powders. The most extensively investigated variant of this technique is Suspension Plasma Spraying (SPS), which utilizes a suspension of fine powders in an appropriate medium. The relatively recent advent of axial feed capable plasma spray systems can enable higher throughputs during SPS, provides the possibility for spraying with longer stand-off distances, and also permit the use of suspensions with higher solid loading. The present work investigates axial plasma sprayed coatings produced using a mixed suspension of fine (submicron or nano-sized) powders of Al(2)O(3)and YSZ as a case study. Deposition of the mixed suspension using axial injection plasma spraying, comprehensive evaluation of characteristics of the resulting coatings, and assessment of their tribological behavior were of particular interest. Evaluation of surface morphology, microstructure, and hardness of the coatings reveals that axial SPS of mixed suspensions provides an exciting pathway to realize finely structured multi-constituent coatings using suspensions with as high as 40 wt.% solid loading. The study of scratch, dry sliding wear, and erosion behavior also specifically shows that the addition of YSZ in the Al(2)O(3)matrix can improve the tribological properties of the coating.

By the author/editor: Goel, Sneha, 199 ...; Björklund, Stefa ...; Curry, Nicholas, ...; Govindarajan, Si ...; Wiklund, Urban; Gaudiuso, Cateri ...; show more...; Joshi, Shrikant ...; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

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