(Mg_(2)Si+Si)/Al复合材料的组织和耐磨性  

Microstructure and wear resistance of(Mg_(2)Si+Si)/Al composites

作　　者：刘晓波[1] 杨淼 周德坤[1] LIU Xiao-bo;YANG Miao;ZHOU De-kun(College of Mechanical Engineering,Beihua University,Jilin 132021,China;Engineering Training Center,Beihua University,Jilin 132021,China)

机构地区：[1]北华大学机械工程学院,吉林省吉林市132021 [2]北华大学工程训练中心,吉林省吉林市132021

出　　处：《吉林大学学报（工学版）》2024年第4期938-946,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金地区科学基金项目(51964011);吉林省科技发展计划项目(YDZJ202101ZYTS172);吉林省教育厅科学技术研究项目(JJKH20210036KJ,JJKH20230062KJ)。

摘　　要：采用熔铸法制备了不同凝固速率的原位(Mg_(2)Si+Si)/Al复合材料,研究了其组织和耐磨性。结果表明,磷改性后,初生Mg_(2)Si为多边形块状,初生Si仍为复杂形貌。随着凝固速率的提高,初生Mg_(2)Si和初生Si的数量随之增加,尺寸随之减小。萃取试验表明,Mg_(2)Si晶体具有十四面体和六面体形貌。研究了不同滑动速度和载荷条件下复合材料对45#钢的干滑动磨损行为。结果表明,复合材料的耐磨性随着凝固速率的提高而提高,(Mg_(2)Si+Si)/Al复合材料的失效机制主要是黏着磨损和磨粒磨损。In-situ(Mg_(2)Si+Si)/Al composites were prepared by using melting casting with different solidification rates.The microstructure and wear resistance of(Mg_(2)Si+Si)/Al composites were investigated.The results show that,after P modification,the primary Mg_(2)Si transformed to polygonal blocks,while the primary Si was mainly complex morphology.With increasing the solidification rate,the number of primary Mg_(2)Si and primary Si particles increased and their particle sizes decreased.Extraction tests showed that the Mg_(2)Si crystals had tetrahedral and hexahedral morphologies.Dry sliding wear behaviors of(Mg_(2)Si+Si)/Al composites with different solidification rates against 45#steel,under conditions of different sliding speeds and loads,were investigated.The results show that,the wear resistance of(Mg_(2)Si+Si)/Al composites increased with the increasing of the solidification rate.The wear mechanisms of(Mg_(2)Si+Si)/Al composites are mainly adhesive wear and abrasive wear.

关 键 词：原位(Mg_(2)Si+Si)/Al复合材料 显微组织 干滑动磨损 耐磨性 

分 类 号：TB331[一般工业技术—材料科学与工程]