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Effect of melt convection on primary dendrite arm spacing in directionally solidified Pb-26%Bi hypo-peritectic alloys HU Xiao-wu, LI Shuang-ming, GAO Si-feng, LIU Lin, FU Heng-zhi State Key... phase in directionally solidified Pb-26%Bi (mass fraction) hypo-peritectic alloys was measured by considering the effect of melt convection in cylindrical samples with different diameters......
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(A1,Mn)3Ti-2V金属间化合物的热腐蚀研究 高克玮1,桥本健纪2,乔利杰1,褚武扬1,金光熙1,李金许1,齐慧滨1 (1.北京科技大学材料物理系,北京,100083;2.日本学术振兴会,东京 102-8471,日本) 摘要:研究了(Al,Mn)3Ti-2V和TiAl在900℃的(Na,K)2SO4以硬850℃的Na2SO4+NaCl熔盐中的热腐蚀行为.结果表明,(Al,Mn)3Ti-2V在(Na,K)2SO4中的耐蚀性很好,腐蚀产物膜很薄,外层是保护性的A12O3,内层是Al2O3+TiO2+TiS的混合膜.当熔盐中存在NaCl时,(Al,Mn)3Ti-2V的耐蚀性极差,腐蚀产物的厚度比在(Na,K)2SO4中大100多倍,且具有分层结构,最外层富MnO(含少量Al2O3和TiO2),第二层为Al2O3+少量TiS,第三层为TiO2+TiS,由于不能形成保护性的Al2O3层......
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High coercivity Nd-Ce-Fe-B nanostructured ribbons prepared from melt spinning techniqueLiang Zha1,Zhou Liu1,Hao Chen2,Mingzhu Xue1,Guanyi Qiao1,Shilei Ding1,Xin Wen1,Meiling Zhang3,Youfang..., 0.2, 0.4, 0.6) nanocrystalline ribbons were prepared by annealing amorphous ribbons from melt spinning. It is found that all ribbons are in a multiphase state consisting of a-Fe phase, Nd(Ce)-rich......
High coercivity Nd-Ce-Fe-B nanostructured ribbons prepared from melt spinning techniqueLiang Zha1,Zhou Liu1,Hao Chen2,Mingzhu Xue1,Guanyi Qiao1,Shilei Ding1,Xin Wen1,Meiling Zhang3,Youfang..., 0.2, 0.4, 0.6) nanocrystalline ribbons were prepared by annealing amorphous ribbons from melt spinning. It is found that all ribbons are in a multiphase state consisting of a-Fe phase, Nd(Ce)-rich......
InP Bulk Crystals Grown from Various Stoichiometric Melt Sun Tongnian1,Zhao Zhengping2,Sun Niefeng3,Zhou Xiaolong1,Wu Xiang2,Mao Luhong3 (1.National Key Laboratory of ASIC, Hebei Semiconductor..., China) Abstract:InP crystal was grown from stoichiometric or non-stoichiometric melt, including P-rich and In-rich condition by the P-injection synthesis LEC method. Owing to the non-stoichiometric......
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Study on the Free-Surface Flow of Silicon Melt in the CrucibleLi Yingchun;Wan Qun;Qin Fu General Research Institute for Non-ferrous Metals,Beijing,China摘 要:<正> The flowing of the free-surface-layer melt in the crucible has been studied by means of observing the movement ofthe mark particle on the free-surface of silicon melt.A new view......
Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field WANG Bin(汪 彬), YANG Yuan-sheng(杨院生), MA Xiao-ping(马晓平), TONG Wen-hui(童文辉) Institute of Metal Research... and on the distribution of magnetic and flow fields were numerically studied. The pulsed magnetic field increases melt convection, which stirs and fractures the dendritic arms into pieces. These broken pieces......