Al2O3—TiC—Co与Al2O3—TiC陶瓷冲蚀磨损行为的比较研究

无机材料学报

Al₂O₃—TiC—Co与Al₂O₃—TiC陶瓷冲蚀磨损行为的比较研究

茅东升; 郦剑; 郭绍义; 毛志远

浙江大学材料科学与工程系杭州 310027

收稿日期:1996-09-16 修回日期:1996-10-21 出版日期:1997-10-20 网络出版日期:1997-10-20

Study of Erosion Behavior of Al₂O₃-TiC-Co and Al₂O₃-TiC Ceramics

MAO Dongsheng; LI jian; GUO Shaoyi; MAO Zhiyuan

Dept. of Materials Science Engineering; Zhejiang University Hangzhou 310027 China

Received:1996-09-16 Revised:1996-10-21 Published:1997-10-20 Online:1997-10-20

摘要/Abstract

摘要： 通过特殊的化学处理方法，完成了对Al₂O₃及TiC陶瓷粉末的钴包覆．将包覆后的两种粉末按70wt％Al₂O₃－Co和300wt％TiC－Co的比例混合烧结出硬度和韧性都较理想的Al₂O₃-TIC－Co（ATC）精细陶瓷.通过SEM观察研究其冲依磨损行为,并对AT30（70wt％Al₂O₃－30wt％TiC）和ATC陶瓷的冲蚀行为及冲蚀机制进行了比较研究．与AT30陶瓷相比，ATC陶瓷良好的综合力学性能和细致的微观结构使得其比AT30陶瓷更为耐磨；磨损表面表现为浅层的颗粒脱落、微裂纹和塑性变形．而AT30陶瓷则表现为深层的颗粒脱落．

关键词: ATC陶瓷, AT30陶瓷, 冲蚀磨损, 力学性能, 微观结构

Abstract: By a newly developed powder process, a layer of metal cobalt film was coated on the surface of fine ceramic powder of Al_2O_3 and TiC. The mixture of the two
kinds of Co-coated powder (about 70wt%Al₂O₃-Co+30wt%TiC-Co) was hot-pressed into advanced Al₂O₃-TiC-Co(ATC) ceramic. Scanning electron
microcopy (SEM) observation was employed to investigate its erosion behavior. Comparing with AT30 (70wt%Al₂O₃+30wt%TiC) ceramic, its high fracture
toughness and fracture strength with relative fine microstructure make it more resistant than At30 ceramic against particle erosion under different impact velocity and impact
angles. The SEM shows that the worn surface exhibits shallow detaching, microcrack and plastic deformation. Its proper wear resistance not only depends on its
mechanical properties, but also its microstructure.

Key words: ATC ceramic, AT30 ceramic, erosion, mechanical properties, microstructure

茅东升,郦剑,郭绍义,毛志远. Al₂O₃—TiC—Co与Al₂O₃—TiC陶瓷冲蚀磨损行为的比较研究[J]. 无机材料学报.

MAO Dongsheng,LI jian,GUO Shaoyi,MAO Zhiyuan. Study of Erosion Behavior of Al₂O₃-TiC-Co and Al₂O₃-TiC Ceramics[J]. Journal of Inorganic Materials.

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Al₂O₃—TiC—Co与Al₂O₃—TiC陶瓷冲蚀磨损行为的比较研究

Study of Erosion Behavior of Al₂O₃-TiC-Co and Al₂O₃-TiC Ceramics

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