摘要
比较了 Si C和 Gr颗粒混杂增强 Al基复合材料的干摩擦磨损行为 ,并与单一 Si CP和单一 Gr P增强 Al基复合材料的相应行为进行了比较。结果表明 ,在低载荷 (<30 N)时 ,Si CP和 Gr P能协调作用 ,使混杂复合材料的摩擦系数和磨损率均比单一 Si CP和 Gr P增强复合材料低。在较高载荷 (30~ 12 0 N)时 ,混杂复合材料磨损以剥层磨损机制为主 ,摩擦系数比单一 Si CP增强复合材料低 ,磨损率比单一 Gr P增强复合材料低得多 ,比单一 Si CP增强复合材料高。混杂复合材料对偶件的磨损比单一 Si
Dry friction and wear behavior of Al matrix composites including those hybridizedly reinforced with 20 vol%SiC and 9 vol%Gr particles, and those separately reinforced with 20 vol%SiC and 9 vol%Gr particles were investigated. The wear tests were performed using a pin on disk wear machine under dry sliding condition, at a speed of 0.6 m/s within a load of 10 N to 120 N. At low loads (<30 N), the friction coefficient and wear rate of hybrid composites were all lower than those of composites reinforced respectively with SiC P and Gr P, because of cooperation of load bearing of SiC P and self lubrication of Gr P. At higher loads (30~120 N), the wear rate of hybrid composite was higher than that of SiC P/Al because of surface delamination of hybrid composite, but was greatly lower than Gr P/Al. The friction coefficient of hybrid coompisite was less than that of SiC P/Al. The wear rate of counterface which mated with pin of hybrid composite was largely lower than that of SiC P/Al at all loads.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2000年第1期60-64,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金! ( 5 97710 13 )