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

被引：0
作者：
Zesati-Belmontes, Sara I. [1 ,2 ]
Lopez-Baltazar, Enrique A. [2 ]
Ruiz-Mondragon, Jose J. [3 ]
Ruiz-Luna, Haidee [2 ,4 ]
Alvarado-Hernandez, Francisco [2 ]
Baltazar-Hernandez, Victor H. [2 ]
机构：
[1] CIATEQ, Manufactura Avanzada Sede Aguascalientes, Aguascalientes 20358, Mexico
[2] Univ Autonoma Zacatecas, Mat Sci & Engn Program, Zacatecas 98000, Mexico
[3] Corp Mexicana Invest Mat SA CV, Coahuila 25290, Mexico
[4] Univ Autonoma Zacatecas, CONACYT, Zacatecas 98000, Mexico
来源：
REVISTA DE METALURGIA | 2022年 / 58卷 / 04期
关键词：
-% TiO2 coatings; Macroroughness; Sliding wear; Thermal spraying; Thick coating; MECHANICAL-PROPERTIES; PLASMA SPRAY; RESISTANCE; ROUGHNESS; SUBSTRATE; BEHAVIOR;
D O I：
10.3989/revmetalm.232
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
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 gamma-Al2O3 and alpha-Al2O3 throughout the coating was promoted by partially melted and un-melted particles; however, the formation of interlayers of hard alpha-Al2O3 was influenced by the re-heating during the multi-pass torch causing transformation from gamma-Al2O3 ->alpha-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 gamma-Al2O3 (toughness) and alpha-Al2O3 (hardness) phases and, predominantly by the reduced porosity and micro-cracks in specimens with the knurling pattern.
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页数：9
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