表面技术2017，Vol.46Issue(2)：87-91,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.02.013
机械合金化制备TiB2-Ni(Al)复合粉末组织结构研究
Microstructure of TiB2-Ni(Al) Composite Powder Prepared by Mechanical Alloying
摘要
Abstract
The work aims to obtain TiB2-Ni(Al) composite powder through in-situ synthetic technology. Ni(Al)-based com-posite powder reinforced by TiB2 ceramic phase with different volume contents was prepared by mechanical alloying method under different ball milling time. The molar ratio of Ni and Al was 1:1. The microstructure and phase of ball-milled powder were analyzed with scanning electron microscopy (SEM) and X-ray diffraction (XRD) respectively. The influence of various ball mil-ling time on the phase evolution of TiB2-Ni(Al) composite powder prepared, microstructure and interfacial bonding between particles was studied. In the process of ball milling, with the milling time prolonging, the plastic deformation between Ni/Al was conducive to atom diffusion and the size of TiB2 ceramic phase particle became smaller and smaller. When the ball milling time increased to a certain extent, the Al powder particles of good ductility would be flattened and its surface area became larger. In such case, the broken Ni powder particles were embedded into Al powder particles to finally form Ni(Al) solid solution. Mean-while, according to the analysis of XRD, with the ball milling prolonging, Al peak in TiB2-Ni(Al) composite powder was gradu- ally decreased, which revealed that Al constantly diffused into Ni to form a certain amount of Ni(Al) solid solution. Ni(Al) solid solution can be successfully in-situ synthesized by mechanical ball milling technology after a certain milling time, so it is re-vealed that the inter-diffusion between Ni and Al is in favor of forming Ni(Al) solid solution.关键词
机械合金化/TiB2-Ni(Al)复合粉末/组织结构/原位合成/冷喷涂/固溶体Key words
mechanical alloying/TiB2-Ni(Al) composite powder/microstructure/in-situ synthesis/cold spraying/solid solution分类
矿业与冶金引用本文复制引用
陈枭,王洪涛,白小波,杨超..机械合金化制备TiB2-Ni(Al)复合粉末组织结构研究[J].表面技术,2017,46(2):87-91,5.基金项目
国家自然科学基金项目(51461022) （51461022）
江西省自然科学基金项目(20132BAB216014) （20132BAB216014）
江西省教育厅落地计划项目(KJLD12096)Supported by the National Natural Science Foundation of China (51461022), the Natural Science Foundation of Jiangxi Province (20132BAB216014) and Science and Technology Project of Jiangxi Educational Bureau (KJLD12096) （KJLD12096）
