干滑動磨損性能
( 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, 鎮(zhèn)江 212003)
摘 要: 研究了新型反應(yīng)體系A(chǔ)359-Zr(CO3)2熔體反應(yīng)法制備的(Al3Zr+ Al2O3)p/A359復(fù)合材料干滑動磨損性能。結(jié)果表明： 復(fù)合材料的磨損量隨著載荷的增大和時(shí)間的延長均遠(yuǎn)小于基體磨損量， 由于顆粒的支撐和減磨作用， 使得同一條件下復(fù)合材料的磨損量隨顆粒體積分?jǐn)?shù)的增加而減少；當(dāng)載荷為98 N時(shí)， 12%(Al3Zr+Al2O3)P/A359復(fù)合材料的磨損量為20.2 mg， 而基體材料的磨損量為54.5 mg， 復(fù)合材料比基體材料耐磨性提高了2.5倍； 由磨損表面SEM觀察表明， 基體A359合金存在嚴(yán)重粘著和變形， 表現(xiàn)為粘著磨損和剝層磨損，復(fù)合材料的磨損類型表現(xiàn)為磨粒磨損。
關(guān)鍵字: (Al3Zr+ Al2O3)p/A359復(fù)合材料； 熔體反應(yīng)法合成； 耐磨性； 磨損機(jī)制
CHENG Xiao-nong1, JI Jia-ming1, ZHU Yan-shan1, FENG Qin1
（ 1. School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China;
2. Zhengjiang Watercraft College of PLA, Zhenjiang 212003, China）
Abstract: (Al3Zr+ Al2O3)p/A359 composites were fabricated by direct melt reaction method in novel system A359-Zr(CO3)2 . The dry sliding wear properties of these composites were studied. The results show that the wear mass loss of (Al3Zr+ Al2O3)p/A359 composites is less than that of A359 matrix alloy with increasing load and sliding time. The wear mass loss of (Al3Zr+ Al2O3)p/A359 composites decreases further with the increase of Al3Zr and Al2O3 volume fraction under the same condition because of Al3Zr and Al2O3 supporting and reducing milling. Under the condition that the load is 98 N, the wear mass loss of 12%(Al3Zr+Al2O3)P/A359 composites is only 20.2 mg, whereas the wear mass loss of A359 matrix alloy is 54.5 mg. Thus the wear-resisting property of this composite is enhanced by 2.5 times than its matrix A359 alloy. The observation of wear surface of (Al3Zr+ Al2O3)p/A359 composites and the matrix A359 alloy with the help of SEM indicates that severe adhesion and deformation occurs on the wear surface of A359 alloy. The wear mechanism of the matrix A359 alloy is stripped and adhesive wear, while the wear surface of (Al3Zr+ Al2O3)p/A359 composites is superior to that of the matrix A359 alloy. The wear mechanism of (Al3Zr+ Al2O3)p/A359 composites is abrasive wear.
Key words: (Al3Zr+ Al2O3)p/A359 composites; direct melt reaction synthesis; wear-resistance; wear mechanism
