Effect of surface macroroughness on the microstructure and sliding wear properties of Al2O3 + 13 wt.% TiO2 thick coatings-Reference-Cited by-同舟云学术

Effect of surface macroroughness on the microstructure and sliding wear properties of Al2O3 + 13 wt.% TiO2 thick coatings

Published:2022-12-27 Issue:4 Volume:58 Page:e232
ISSN:1988-4222
Container-title:Revista de Metalurgia
language:
Short-container-title:revmetal

Author:

Zesati-Belmontes Sara I.^ORCID,López-Baltazar Enrique A.^ORCID,Ruiz-Mondragón José J.^ORCID,Ruiz-Luna Haideé^ORCID,Alvarado-Hernández Francisco^ORCID,Baltazar-Hernández Víctor H.^ORCID

Abstract

ABSTRACT Two macro-roughness patterns namely spiral grooving and diamond knurling were performed on an AISI/SAE 1045 cylindrical steel bar. Al2O3 + 13 wt.-% TiO2 powder was deposited by utilizing a multi-pass torch. Microstructure, microhardness and wear resistance were analyzed. The presence of both γ-Al2O3 and α-Al2O3 throughout the coating was promoted by partially melted and un-melted particles; however, the formation of interlayers of hard α-Al2O3 was influenced by the re-heating during the multi-pass torch causing transformation from γ-Al2O3→α-Al2O3. Knurling pattern specimens contained less defects owe to a suitable splat accommodation thus strengthening the inter-splat anchorage. The improved sliding wear resistance was influenced by both the combination of γ-Al2O3 (toughness) and α-Al2O3 (hardness) phases and, predominantly by the reduced porosity and micro-cracks in specimens with the knurling pattern.

Publisher

Editorial CSIC

Subject

Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics

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