复合区体积分数对氧化锆增韧氧化铝颗粒/40Cr空间结构复合材料冲击磨损性能的影响  

Effect of composite volume fraction on impact wear properties of zirconium oxide toughened alumina particles/40Cr architecture composites

作　　者：胥长龙 卢德宏[1] 唐露 李明宇 XU Changlong;LU Dehong;TANG Lu;LI Mingyu(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650032,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650032

出　　处：《复合材料学报》2020年第9期2223-2229,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51461025)。

摘　　要：为研究空间结构复合材料中复合区体积分数对复合材料冲击磨损性能的影响,采用挤压铸造法制备了不同复合区体积分数(35vol%、50vol%、65vol%)的氧化锆增韧氧化铝颗粒(ZTAP)三维网络增强40Cr钢基复合材料(ZTAP/40Cr空间结构复合材料),经过850℃淬火和460℃回火,在冲击功为1.5 J下进行无磨料冲击磨损实验。结果表明:复合区体积分数为35vol%、50vol%、65vol%的ZTAP/40Cr空间结构复合材料磨损率分别为4.68×10^-3 cm^3/h、3.40×10^-3 cm^3/h、1.04×10^-3 cm^3/h,ZTAP/40Cr复合材料和40Cr钢的磨损率分别为13.41×10^-3 cm^3/h和79.87×10^-3 cm^3/h。ZTAP/40Cr空间结构复合材料的耐磨性随复合区体积分数增加而提高。进一步分析表明,ZTAP/40Cr空间结构复合材料的冲击磨损机制包含表面发生的磨粒磨损和黏着磨损,主要是基体黏着和整个表面被犁削及亚表层萌生的疲劳磨损,是由反复冲击过程中产生的ZTAP破碎和ZTAP与40Cr界面开裂导致的材料块状脱落。In order to study the effect of composite volume fraction on the impact wear properties of composites in architecture composites,the zirconium oxide toughened alumina particles(ZTAP)3 D network reinforced 40 Cr steel matrix composites(ZTAP/40 Cr architecture composite)with different composite volume fractions(35 vol%,50 vol%,65 vol%)were fabricated by squeeze casting,which were subjected to no abrasives impact wear test with an impact energy of 1.5 J after quenching at 850℃and tempering at 460℃.The results show that when the volume fraction of the composite area is 35 vol%,50 vol%and 65 vol%,the wear rates of the ZTAP/40 Cr architecture composites are 4.7×10^-3 cm^3/h,3.4×10^-3 cm^3/h and 1.0×10^-3 cm^3/h,respectively.The wear rates of the ZTAP/40 Cr composite and the40 Cr steel are 13.41×10^-3 cm^3/h and 79.87×10^-3 cm^3/h,respectively.The wear resistance of the ZTAP/40 Cr architecture composite increases as the volume fraction of the composite area increases.Further analysis show that the impact wear mechanism of the ZTAP/40 Cr architecture composite includes abrasive wear and adhesive wear on the surface,mainly the adhesion of the matrix and the ploughing of the entire surface,as well as the fatigue wear of the subsurface,which is a blockage of materials caused by ZTAP breakage and ZTAP/40 Cr interfacial cracking during repeated impact.

关 键 词：空间结构 复合区体积分数 冲击磨损 挤压铸造 钢基复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程]