摘要
以亚微米级（130nm）SiCp和100—200目（149—75μm）Al粉为原料，采用冷压烧结和热挤压方法制备出不同体积分数的微米SiCp增强Al基复合材料，并在油润滑条件下，对其滑动磨擦特性进行了研究．结果表明i在较高载荷下，体积分数为1．5％和5．0％的SiCp／Al基复合材料具有优异的滑动磨损抗力，且随SiCp含量增加，复合材料的耐磨性能提高，耐磨性可迭市售挤压态锡青铜QSn6．5—0．4的1．21和4．06倍、纯Al的1．10和3．66倍；其磨损表面和次表面在摩擦推挤形变的作用下形成了Al基体＋孔隙＋尺寸适中、近球状、弥散分布SiCp的理想耐磨减摩组织．
Sliding wear-resistance of 1.5 - 5.0% SiCp （ 130 nm）/A1 （ 149 - 75 μm ） matrix composites fabricated by powder metallurgy followed by hot extrusion has been investigated. The purpose is to study the submicrometer SiCp dispersed in alumina matrix. The results showed that 1.5% and 5.0% of SiCp/ Al composite have excellent sliding wear resistance. With the increase in SiCp （130 nm） volume fraction, the sliding wear property increases, and the sliding wear resistance is respectively 1.21 and 4.00 times of popularly used 6.5 - 0. 4 bronze bearing materials, and 1.10 and 3.66 times of M under the higher load. An excellent wear-resistance microstructure consisting of aluminum matrix, minute hole, spherical and moderate size, and homogeneous distribution of SiCp was formed in the wear surface of SiCp/ Al matrix composites due to the plastic deformation resulting from friction and attrition.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2006年第2期144-146,共3页
Journal of Jiangsu University：Natural Science Edition
基金
江苏省高校自然科学研究基金资助项目(03KJD460165)
