A Novel Method for Adding Graphite Flakes to Al2O3-ZrO2-Graphite Composites and Performance Testing

Huang Yong; Ai Yunlong; Chen WeihuaHe WenZhang JianjunLiang Bingliang

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A Novel Method for Adding Graphite Flakes to Al2O3-ZrO2-Graphite Composites and Performance Testing

机译：A Novel Method for Adding Graphite Flakes to Al2O3-ZrO2-Graphite Composites and Performance Testing

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abstract_textpA novel method to produce graphite flakes was invented, and this method is good for homogeneous of graphite among the Al2O3-ZrO2-Graphite composite powder. Graphite ball, alumina ball, and alumina powder are put into planetary muller together, and the graphite flakes are produced by shear forces between the surface of graphite and alumina ball during the ball mill process. Al2O3-chi wtZrO2-3wtGraphite (A-chi Z-3Gr, chi = 5, 10, 15, 20) composites powder are developed by this new method and then are sintered using microwave at a temperature of 1500 degrees C for 30 min in argon atmosphere. Actually 3wtGraphite (Gr) is fully capable of forming a lubricating film on the rubbing surface of A-chi Z-3Gr composites to ensure a low friction coefficient. On the other hand, the ZrO2 addition is good for the mechanical properties. The effect of ZrO2 addition on the relative density, hardness, fracture toughness and bending strength of the various A-chi Z-3Gr composites are investigated. The performance of A-chi Z-3Gr composites has been greatly improved as compared with Al2O3-3 wt Graphite sintered under the same condition. The A-10Z-3Gr composite exhibited excellent performance such as its relative density, hardness, fracture toughness, bending strength, friction coefficient, and wear rate are 95.4, 323.7Mpa, 5.8Mpa center dot m(1/2), 9.3Gpa, 0.31 and 5.19 x 10(-6)mm(3) Nm(-1), respectively./p/abstract_text

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来源
《advanced engineering materials》 |2019年第7期|共8页
作者
Huang Yong; Ai Yunlong; Chen WeihuaHe WenZhang JianjunLiang Bingliang;
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作者单位

Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Jiangxi, Peoples R China;

Met Mat Microstruct Control Jiangxi Prov Key Lab, Nanchang 330063, Jiangxi, Peoples R China;

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正文语种英语
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Al2O3-ZrO2; graphite flakes; wear; mechanical properties; TRIBOLOGICAL PROPERTIES; STRUCTURAL PARAMETERS; BEHAVIOR; ALUMINA; EXFOLIATION; RESISTANCE; GRAPHENE; DESIGN; SIZE;

A Novel Method for Adding Graphite Flakes to Al2O3-ZrO2-Graphite Composites and Performance Testing

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