摘要
为提高ZL109合金的耐磨损性能,用挤压铸造法制备了硅酸铝短纤维（Al2O3-SiO2f）和石墨颗粒（Grp）混杂增强ZL109复合材料.采用SRV摩擦磨损试验机研究了石墨颗粒含量和运动频率对该混杂复合材料的抗咬合性能的影响.结果表明：单一20%Al2O3-SiO2f增强复合材料的咬合载荷较基体合金有大幅度提高,混杂Grp后复合材料的咬合载荷进一步提高,且其含量为5%-8%时咬合载荷最大;复合材料的抗咬合性能比基体合金提高2倍以上,运动频率越高,提高幅度越大,当运动频率为100 Hz时,经20%Al2O3-SiO2f＋5%Grp混杂增强的复合材料其抗咬合性能的提高幅度最高达12倍.Al2O3-SiO2f和Grp混杂增强可以显著改善ZL109合金的抗咬合性能.
To improve wear properties of the Al -12Si alloy,the hybrid composites of the Al-12Si alloy reinforced with aluminosilicate short fiber （ Al2O3 - SiO2f ） and graphite particle （ Grp ） were fabricated by squeeze casting. The effects of graphite content and moving frequency on the anti-seizure property of the hybrid composites were investigated by SRV friction and wear equipment. The results show that seizure load of the composites of Al-12Si reinforced with 20% Al2O3 -SiOEf was improved markedly compared to monolithic Al-12Si alloy. The addition of graphite particle in the 20% Al2O3 -SiO2f/Al -12Si composites improves the seizure load further. The maximum of the seizure load could be obtained when the graphite particle contents is in the range of 5% - 8% volume fraction. The anti-seizure property of the composites is improved by twice at least. The higher is the moving frequency, the more is the improving degree. The anti-seizure property of the hybrid composites reinforced with 20% Al2O3 -SiOEf and 5% Grp is improved by twelve times compared to monolithic Al-12Si alloy when the moving frequency is 100Hz. The anti-seizure property of the Al - 12Si alloy was improved remarkably due to mutual effect of Al2O3 - SiO2 fiber and Gr particle.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2007年第3期370-373,共4页
Materials Science and Technology
基金
广东省科技攻关计划资助项目(2003B12102)
广东省自然科学基金资助项目(980563)
华南理工大学自然科学基金资助项目(305-E5040440)
关键词
金属基复合材料
混杂
抗咬合性能
metal matrix composites
hybrid
anti-seizure property
