Wear Resistance Mechanism of Alumina Ceramics Containing Gd2O3

Tingting Wu; Jianxiu Su; Yongfeng Li; Hongyuan Zhao; Yaqi Zhang; Mingming Zhang; Bolin Wu

doi:10.3390/ma11102054

Materials (Oct 2018)

Wear Resistance Mechanism of Alumina Ceramics Containing Gd2O3

Tingting Wu,
Jianxiu Su,
Yongfeng Li,
Hongyuan Zhao,
Yaqi Zhang,
Mingming Zhang,
Bolin Wu

Affiliations

Tingting Wu: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Jianxiu Su: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Yongfeng Li: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Hongyuan Zhao: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Yaqi Zhang: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Mingming Zhang: Research Branch of Advanced Materials & Green Energy, School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
Bolin Wu: College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China

DOI: https://doi.org/10.3390/ma11102054
Journal volume & issue: Vol. 11, no. 10
p. 2054

Abstract

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Excellent wear resistance of alumina ceramics is a desirable quality for many products. The purpose of this work was to improve the wear resistance of 99% alumina ceramics in an Al2O3–Gd2O3–SiO2–CaO–MgO (AGSCM) system. The content of Gd2O3 varied from 0.01% to 1%. A test of wear rate was performed in a ball milling apparatus in a water environment according to the Chinese industry standard. The compositions and microstructure of this material, as well as the effect of bulk density on wear rate, were studied. The effect of Gd2O3 on phases, grain growth mode, and grain boundary cohesion was investigated. It was found that Gd2O3 could refine grain size, form compressive stress of the grain boundary, and promote the crystallization of CaAl12O19. The wear rate of this material was as low as 0.00052‰ (the Chinese industry standard wear rate is ≤0.15‰). The mechanisms for wear resistance of AGSCM ceramics were also determined.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

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