共搜索到13996条信息,每页显示10条信息,共1400页。用时:0小时0分0秒390毫秒
......
by reaction of the primary precipitation solid phase directly with the liquid at peritectic temperature, clearly different from the solidification aspects of single phase and eutectic system. Recently... with peritectic reaction resulting in the primary phase enveloped by the peritectic phase. Fig.2 illustrates the solidification microstructures of Cu-75%Sn peritectic alloy in transverse section grown......
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.... Key words: intermetallic compounds; Ni-Al; reaction synthesis; microstructure 1 Introduction Ni-Al alloys are well known as high temperature structural materials due to their low density, high melting......
solidification of melts producing the peritectic reaction [J]. Acta Metal, 1961, 9(9): 835-840. [5] Livingston J D. Growth of duplex crystals [J]. Mater Sci Eng, 1971, 7(2): 61-70. [6] Flemings M C.... The structure of directionally solidified two-phase Sn-Cd peritectic alloys [J]. Metal Trans, 1974, 5(9): 2023-2031. [9] Lee J H, Verhoeven J D. Peritectic formation in the Ni-Al system [J]. J Crystal Growth......
microalloyed steel, especially the hypo-peritectic steel with a carbon content of 0.09%-0.17%, peritectic reaction is an important transformation mode in the initial stage of solidification [1-4... solidification was high-temperature δ-ferrite, and the peritectic transformation L+δ→γ occurred when the temperature dropped to the peritectic reaction temperature, while the whole phase change process......
in the mushy zone during directional solidification of Sn-Ni peritectic alloy was investigated in this study. Examination on the experimental results demonstrates that both the temperature gradient zone...Analysis on fluid permeability of dendritic mushy zone during peritectic solidification in a temperature gradientPeng Peng1,2,Jinmian Yue1,2,Anqiao Zhang1,2,Xudong Zhang1,2,Yuanli Xu1,21. Institute......
包晶反应产物侧向生长速度的研究常国威1,金光灿1,陈淑英1,李青春1,岳旭东1(1.辽宁省锦州市辽宁工业大学材料科学与工程学院)摘 要:针对Fe-C合金包晶反应过程中,γ相沿L/δ界面侧向生长速度的实测值远远大于Bosze和Trivedi模型的计算值的问题,分析了包晶反应过程中固/液界面前沿溶质浓度分布状况,得到了金属熔体中圆柱形固相生长时固/液界面前沿溶质浓度分布表达式.以Jackson提出的熔体中粗糙界面生长速度公式为基础,确定了适合计算合金包晶反应产物侧向生长速度的公式,并将其应用于Fe-C和Fe-Ni合金的包晶反应过程,计算结果表明,Fe-C和Fe-Ni合金的包晶反应产物γ相的侧向生长速度计算值与Shibata等和Mcdonald等在激光共聚焦扫描显微镜下观察Fe-C和Fe-Ni合金包晶反应时所测......
grow in the velocity range between 25 and 60 μm/s due to their similar growth temperatures. Key words: Ni-Al alloys; directional solidification; intermetallic compound; undercooling; eutectic; growth velocity; microstructure 1 Introduction In the 1980s and 1990s, much effort has been expended to find out the location of the eutectic and the peritectic points in the binary Ni-Al system [1-5......
with the composition of Mg32Zn60Y8. The I-phase formation undergoes a peritectic reaction between the H-phase and the remained melt. 2) The solidification sequence is clearly corelated to the microstructure, which... in the as-solidified alloy, where the icosahedral quasicrystal, whose structure is indentified to be a face-centered type, originates from a peritectic reaction occurring at 416 ℃. The primary phase......
-zhi, WEI Na, ZENG Liang-liang, WANG Xiao-bin, TANG Hua-jie. Microstructure and formation mechanism of Ni-Al intermetallic compounds fabricated by reaction synthesis [J]. Transactions of Nonferrous... and Thermochemistry, 2014, 44: 114-118. [4] JUNG S B, MINAMINO Y, YAMANE T, SAJI S. Reaction diffusion and formation of Al3Ni and Al3Ni2 phases in the Al-Ni system [J]. Journal of Materials Science......