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

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(ZTA_P)三维网络增强40Cr钢基复合材料(ZTA_P/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ZTA_P/40Cr空间结构复合材料磨损率分别为4.68×10?3 cm3/h、3.40×10?3 cm3/h、1.04×10?3 cm3/h，ZTA_P/40Cr复合材料和40Cr钢的磨损率分别为13.41×10?3 cm3/h和79.87×10?3 cm3/h。ZTA_P/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，ZTA_P/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ZTA_P破碎和ZTA_P与40Cr界面开裂导致的材料块状脱落。 

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

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(ZTA_P) 3D network reinforced 40Cr steel matrix composites(ZTA_P/40Cr architecture composite) with different composite volume fractions(35vol%, 50vol%, 65vol%) 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 35vol%, 50vol% and 65vol%, the wear rates of the ZTA_P/40Cr architecture composites are 4.7×10?3 cm3/h, 3.4×10?3 cm3/h and 1.0×10?3 cm3/h, respectively. The wear rates of the ZTA_P/40Cr composite and the 40Cr steel are 13.41×10?3 cm3/h and 79.87×10?3 cm3/h, respectively. The wear resistance of the ZTA_P/40Cr architecture composite increases as the volume fraction of the composite area increases. Further analysis show that the impact wear mechanism of the ZTA_P/40Cr 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 ZTA_P breakage and ZTA_P/40Cr interfacial cracking during repeated impact.