共搜索到224208条信息,每页显示10条信息,共22421页。用时:0小时0分0秒562毫秒
Preparation for intermetallic powders of Cu-Sn and Cu-Ni-Sn systems via solid-liquid reaction milling technique CHEN Ding(陈 鼎), WU Wei(吴 薇), CHEN Zhen-hua(陈振华), FU Ding-fa(傅定发), CHEN... alloy; intermetallics powder; solid-liquid reaction milling; mechanochemical effect 1 Introduction The effects of external fields such as the magnetic field, the electric field and the force field......
......
) Ti-67B powder were also discussed. During ball milling the Ti-67B powder, a solid solution of B in Ti, Ti(B) is firstly formed. When the powder is milled for 10 h, the amorphous transition of Ti(B) from... with grain size of 10 nm. The formation of TiB2 nanocrystalline is controlled by the gradual diffusion reaction mechanism. During heat-treatment of the MAed Ti-67B powder, the structural changes of TiB2......
), respectively. The results show that, by room-temperature reaction milling in hydrogen, the as-cast ZK60 Mg alloy can be fully hydrided to form a nanocrystalline MgH2 single-phase microstructure..., suggesting that a portion of the Mg phase was hydrided to MgH2 by the mechanically driven solid-gas reaction Mg+H2→MgH2. With the increase of the milling time, the fraction of MgH2 phase increased while......
......
Preparation of TiAl alloy powder by high-energy ball milling and diffusion reaction at low temperatureHui-Ping Shao,Zhi Wang,Tao Lin,Qing Ye,Zhi-Meng GuoInstitute for Advanced Material and Technology... reaction in vacuum at low temperature. The titanium powder, aluminum powder, and titanium hydride powder were used as raw materials. The samples were characterized by scanning electron microscopy(SEM), X......
Environmental corrosion resistance of porous TiAl intermetallic compounds ZHENG Zhi(郑 治)1, 2, JIANG Yao(江 垚)1, DONG Hong-xing(董虹星)1, TANG Lie-min(汤烈明)1, HE Yue-hui(贺跃辉)1, HUANG Bai-yun... al[1-2] developed a novel technique to fabricate porous TiAl intermetallics using elemental powders by reactive synthesis process. Both the solid diffusion and reaction synthesis during this procedure......
, and resulted in the formation of disordered Ti/Al phases. Dissolution of Al in Ti (after 9 h milling), nanocrystalline Ti/Al solid solution and high density of dislocations were caused by HEBM. The element... Institute of Technology, Harbin 150001, China)Abstract:The Ti-50%Al (molar fraction) composite powder was synthesized by high energy ball milling (HEBM). The characteristics of the composite particles......
contents. According to TANG et al[12], the reaction of Ti33B67 elemental powder during high-energy ball milling can be described as follows: Ti+B→Ti(B) nanocrystalline→Ti(B) amorphous→TiB2... for structural applications. Since refining of grain size to nanocrystalline state has been suggested as a way of improving the ductility of intermetallic compounds, a considerable amount of work has therefore......
Trans. Nonferrous Met. Soc. China 23(2013) 1639-1645 Microstructure and formation mechanism of Ni-Al intermetallic compounds fabricated by reaction synthesis Hong-zhi CUI, Na WEI, Liang-liang ZENG...-Al intermetallic compounds from Ni and Al powder were obtained by thermal explosion. Effects of molar ratio of Ni to Al in raw materials on the phases, microstructures and microhardness of the final......