Microstructure and Friction-Wear Properties of in-situ TiB<sub>2</sub> Reinforced Al-4.5Cu Composites

Yao Junping; Yang Wenfeng; Zhao Huoping

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Microstructure and Friction-Wear Properties of in-situ TiB₂ Reinforced Al-4.5Cu Composites
Vol. 30, Issue 10, Pages: 942-945(2010)
Published： 2010 ，
DOI：

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[1]尧军平,杨文凤,赵火平.原位合成TiB_2/Al-4Cu复合材料的组织和摩擦磨损性能[J].特种铸造及有色合金,2010,30(10):942-945+985.

Yao Junping, Yang Wenfeng, Zhao Huoping. Microstructure and Friction-Wear Properties of in-situ TiB₂ Reinforced Al-4.5Cu Composites. [J]. Special Casting & Nonferrous Alloys 30(10):942-945(2010)
[1]尧军平,杨文凤,赵火平.原位合成TiB_2/Al-4Cu复合材料的组织和摩擦磨损性能[J].特种铸造及有色合金,2010,30(10):942-945+985. DOI：

Yao Junping, Yang Wenfeng, Zhao Huoping. Microstructure and Friction-Wear Properties of in-situ TiB₂ Reinforced Al-4.5Cu Composites. [J]. Special Casting & Nonferrous Alloys 30(10):942-945(2010) DOI：

摘要

采用混合盐反应（MixedSaltReaction）原位合成法成功制备了TiB2/Al-4Cu复合材料

并对其摩擦磨损性能进行了研究。采用X射线衍射分析物相和扫描电镜观察其显微组织

结果表明

原位生成的TiB2颗粒非常细小

尺寸分布在0.1～1.5μm之间

平均尺寸为400nm

均匀分布于晶界处

明显细化了复合材料组织。室温干滑动摩擦磨损试验表明

复合材料耐磨性高于基体合金的

基体合金磨损机制以粘着磨损为主

复合材料磨损机制为磨粒磨损和轻微粘着磨损共同作用。

Abstract

TiB2/Al-4.5Cu composites were prepared by mixed salt reaction in-situ synthesis process

and friction and wear properties of the composites were investigated.Microstructure of the composites was observed by XRD（X-ray diffraction）and SEM（scanning electron microscope）.The results reveal that in-situ TiB2particle with fine grain size in range of 0.1～1.5 μm and average size of 400nm is uniformly distributed along grain boundary

obviously refining the microstructure of the composites.Dry sliding frictional and wear experiment at room temperature shows that wear resistance of the composites is evidently superior to that of matrix alloy.Wear mechanism of matrix alloy is characterized by adhesive wear

and wear mechanism of the composites is characterized by co-action of abrasive wear with slight adhesive wear.