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Fabrication of nano-crystalline W-Ni-Fe alloy with Mo and rare earth element additives

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【Author】 YAN Jian-wu~1, 2 , ZHOU Ji-cheng1, TIAN Li1,LU Shi-qiang2, CHEN Tong-cai2, XU Li-min2(1. School of Physics Science and Technology, Central South University, Changsha 410083, China;2. Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China)

【机构】 School of Physics Science and Technology, Central South University, Changsha 410083, China； Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China,School of Physics Science and Technology, Central South University, Changsha 410083, China,School of Physics Science and Technology, Central South University, Changsha 410083, China,Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China,Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China,Department of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China；

【Abstract】 Three kinds of nano-crystalline high density alloys(86W-7Ni-3Fe-4Mo, 90W-4Ni-2Fe-4Mo and 90W-4Ni-2Fe-3.8Mo-0.2RE) were fabricated by a technique combining lower temperature vacuum sintering with ~high- ~energy ball milling mechanical alloying. The crystalline size and microstructures of the specimens sintered at different sintering temperatures were examined by X-ray diffraction(XRD) and scanning electron microscope(SEM). The results show that the optimal sintering temperature of 86W-7Ni-3Fe-4Mo, 90W-4Ni-2Fe-4Mo and ~90W-4Ni-2Fe- ~3.8Mo-0.2RE alloys are 1300-1350℃. When they are sintered at 1300℃ for 75min, the hardness of three kinds of specimens can reach above HRC30, the relative density can reach above 96%,and 90W-4Ni-2Fe-3.8Mo-0.2RE alloy possesses the best integrated properties, its hardness is HRC35 and its relative density is 98%.更多还原

【关键词】 tungsten high density alloys； nano-crystalline； mechanical alloying； lower temperature sintering；
【Key words】 tungsten high density alloys； nano-crystalline； mechanical alloying； lower temperature sintering；

【基金】 Project(No60171043)supportedbytheNationalNaturalScienceFoundationofChina;Project(ZX200301008)supportedbytheCenterforMaterialsScienceandTechnologyofJiangxiProvince,China

【文献出处】 Transactions of Nonferrous Metals Society of China ,中国有色金属学会会刊(英文版) , 编辑部邮箱 ,2005年03期

【分类号】TB383
【被引频次】1
【下载频次】42

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