Microstructure and wear characteristics of ATZ ceramic particle reinforced gray iron matrix surface composites  

作　　者：Xue Ma Liang-feng Li Fan Zhang Zu-hua Zhang Hao Wang En-ze Wang 

机构地区：[1]School of Materials Science and Engineering,Southwest University of Science and Technology [2]Chengdu Aerospace Superalloy Technology Co.,Ltd [3]Centre for Future Materials,University of Southern Queensland

出　　处：《China Foundry》2018年第3期167-172,共6页中国铸造（英文版）

基　　金：financially supported by the Scientific Research Fund of Si Chuan Provincial Education Department(No.17ZA0395);the Doctoral Program Foundation of Southwest University of Science and Technology(No.10zx7113)

摘　　要：The alumina toughened zirconia(ATZ) ceramic particle reinforced gray iron matrix surface composite was successfully manufactured by pressureless infi ltration. The porous preform played a key role in the infi ltrating progress. The microstructure was observed by scanning electron microscopy(SEM); the phase constitutions was analyzed by X-ray diffraction(XRD); and the hardness and wear resistance of selected specimens were tested by hardness testing machine and abrasion testing machine, respectively. The addition of high carbon ferrochromium powders leads to the formation of white iron during solidifi cation. The wear volume loss rates of ATZ ceramic particle reinforced gray iron matrix surface composite decreases fi rst, and then tends to be stable. The wear resistance of the composite is 2.7 times higher than that of gray iron matrix. The reason is a combination of the surface hardness increase of gray iron matrix and ATZ ceramic particles and alloy carbides protecting effect on gray iron matrix.The alumina toughened zirconia （ATZ） ceramic particle reinforced gray iron matrix surface composite was successfully manufactured by pressureless infiltration. The porous preform played a key role in the infiltrating progress. The microstructure was observed by scanning electron microscopy （SEM）; the phase constitutions was analyzed by X-ray diffraction （XRD）; and the hardness and wear resistance of selected specimens were tested by hardness testing machine and abrasion testing machine, respectively. The addition of high carbon ferrochromium powders leads to the formation of white iron during solidification. The wear volume loss rates of ATZ ceramic particle reinforced gray iron matrix surface composite decreases first, and then tends to be stable. The wear resistance of the composite is 2.7 times higher than that of gray iron matrix. The reason is a combination of the surface hardness increase of gray iron matrix and ATZ ceramic particles and alloy carbides protecting effect on gray iron matrix.

关 键 词：metal-matrix SURFACE composites pressureless infiltrating PARTICLE-REINFORCEMENT SURFACE ALLOYING WEAR testing 

分 类 号：TG143.2[一般工业技术—材料科学与工程]