磨損特性
( 1. 江蘇大學(xué) 材料科學(xué)與工程學(xué)院, 鎮(zhèn)江 212013;
2. 中國人民解放軍鎮(zhèn)江船艇學(xué)院 船艇工程系, 鎮(zhèn)江 212003)
摘 要: 運用A359-Zr(CO3)2體系熔體反應(yīng)法制備了(Al3Zr+Al2O3)p/
A359復(fù)合材料， 研究了增強顆粒的含量對 (Al3Zr+Al2O3)p/A359復(fù)合材料干滑動磨損性能的影響。結(jié)果表明： Zr(CO3)2與A359熔體反應(yīng)生成了Al2O3和Al3Zr顆粒；復(fù)合材料的磨損量隨載荷的增大和時間的延長均遠小于基體的， 同一條件下復(fù)合材料的磨損量隨Al3Zr和Al2O3顆粒含量的增加而減少， 當(dāng)載荷為98 N時， 12%(Al3Zr+Al2O3)p/A359復(fù)合材料（體積分數(shù)）的耐磨性比基體的提高了2.5倍。 磨損表面及亞表面的SEM分析表明， 基體A359磨損表面存在撕裂紋并與亞表面連接， 表現(xiàn)為粘著磨損和剝層磨損； (Al3Zr+Al2O3)p/A359復(fù)合材料的磨損表面及亞表面平整光滑，主要表現(xiàn)為磨粒磨損。
關(guān)鍵字: (Al3Zr+Al2O3)p/A359復(fù)合材料；增強顆粒； 磨損；耐磨性
in situ composite synthesized by
direct melt reaction in Al-Zr-O system
CHENG Xiao-nong1, CHEN Gang1
（ 1. School of Materials Science and Engineering,
Jiangsu University, Zhenjiang 212013, China;
2. Department of Watercraft Engineering,
Zhengjiang College of Chinese People's Liberation Army,
Zhenjiang 212003, China）
Abstract: (Al3Zr+Al2O3)p/A359 composites were fabricated by the direct melt reaction in A359-Zr(CO3)2 system. The influence of swell particle contents on the dry sliding wear properties of (Al3Zr+Al2O3)p/A359 composites were studied. The results show that Al2O3 and Al3Zr particles between Zr(CO3)2 and molten A359 alloy in-situ form. The wear mass loss of (Al3Zr+Al2O3)p/A359 composites is less than that of A359 matrix alloy with the increase of the load and sliding time, the wear mass loss of (Al3Zr+Al2O3)p/A359 composites further decreases with increasing Al3Zr and Al2O3 particles contents under the same condition. When the load is 98 N, the wear-resisting property of 12%(Al3Zr+Al2O3)p/A359(volume fraction) composites enhance 2.5 times than that of the matrix A359 alloy. The SEM images of wear surface and subsurface for (Al3Zr+Al2O3)p/A359 composites and the matrix A359 alloy indicate that the tore crack occurs and connects to the subsurface on the wear surface of A359 alloy. The wear mechanism of the matrix A359 alloy is stripped and adhesive wear, while the wear surface and subsurface of (Al3Zr+Al2O3)p/A359 composites are smooth and lubricity. The wear mechanism of (Al3Zr+Al2O3)p/
A359 composites is abrasive wear.
Key words: (Al3Zr+Al2O3)p/A359 composite; swell particle; wear; wear-resisting
