金属学报  1998, Vol. 34 Issue (5): 489-496

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深过冷液态Co_(85)Cu_(15)亚包晶合金的快速凝固

曹崇德;鲁晓宇;魏炳波

西北工业大学应用物理系;西安;710072;西北工业大学应用物理系;西安;710072;西北工业大学应用物理系;西安;710072

RAPID SOLIDIFICATION OF UNDERCOOLED Co_(85)Cu_(15) HYPOPERITECTIC ALLOY

CAO Chongde; LU Xiaoyu; WEI Bingbo (Department of Applied Physics; Northwestern Polytechnical University; Xi'an 710072)

曹崇德;鲁晓宇;魏炳波. 深过冷液态Co_(85)Cu_(15)亚包晶合金的快速凝固[J]. 金属学报, 1998, 34(5): 489-496.
, , . RAPID SOLIDIFICATION OF UNDERCOOLED Co_(85)Cu_(15) HYPOPERITECTIC ALLOY[J]. Acta Metall Sin, 1998, 34(5): 489-496.

摘要 参考文献 相关文章 Metrics 全文: PDF(1925 KB)   摘要: 采用熔融玻璃净化法使大体积Co85Cu15亚包晶合金的最大过冷度达到351K（0.21TL），实验测得其超过冷临界过冷度为379K.随着过冷度的增大，显微组织由树枝晶转变为等轴晶，并显著细化；溶质截留效应增强，显微偏析程度减小,Co的同素异构转变受到抑制，凝固组织中Co主要是亚稳的过饱和α-Co固溶体,ε-Co含量极少.对初生相形核率进行了理论计算，发现在过冷度为351K时合金熔体仍然发生异质形核.依据LKT／BCT枝晶生长理论对初生相生长速度和枝晶顶端半径进行了理论计算 关键词 ： 包晶合金,  液态金属,  深过冷,  快速凝固     Abstract：Co85Cu15 hypoperitectic alloy melt was undercooled by 351 K (0.21TL ) with glass fluxing technique. The hypercooling limit of this alloy was determined to be 379 K. With increasing undercooling temperature, the microstructure transformed from dendrites into equiaxed grains and was refined drastically. Significant solute trapping has taken place during the rapid solidification of highly undercooled Co85Cu15 alloy, and it resulted in the remarkable extension of solubility of Cu in Co phase and much weaker intragranular segregation. It was also revealed by X-ray diffraction that the microstructures were comprised mainly by metastable supersaturated α-Co and Cu solid solutions together with a small amount of ε-Co phase. In addition,the theoretical calculation for nucleation rate indicates that heterogeneous nucleation has still taken place at an undercooling of 351 K. Calculations of dendrite growth velocity, solubility of Cu in α-Co, partial undercoolings, and dendrite tip radius were also performed on the basis of LKT/BCT theory. Key words： peritectic alloy    liquid metal    undercooling    rapid solidification 收稿日期: 1998-05-18      基金资助:国家杰出青年科学基金!59425002;;国家高技术863－2－7－3资助 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 曹崇德 鲁晓宇 魏炳波 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1998/V34/I5/489 1 Wei B,Herlach D M.Sommer F,Kurz W.Mater Sci Eng,1994:A181/182 1150 2 Wu Y,Piccone T J,Shiohara Y,Flemings M C.Metall Trans;1987:18A:915 3Jansen R,Sahm P R. Mater Sci Eng,1984:65:199 4Wei B, Herlach D M, Feuerbacher B, Sommer F. Acta Metall Mater, 1993: 41: 1801 5Tewari S N Metall Trans; 1987; 18A: 525 6Alien W P, Perepezko J H Metall Trans, 1991: 22A: 753 7Elder S P, Munitz A, Abbaschian G J Mater Sci Forum, 1989: 50: 137 8Munitz A, Elder-Randall S P, Abbaschian R. Metall Truns A,1992: 23: 1817 9Munitz A, Abbaschian R. J Mater Sci, 1991; 26: 6458 10魏炳波,董长星.金属学报,1996;32:357(Wei Bingbo,Dong Changxing Acta Metall Sin.1996;32:357) 11Lipton J, Kurz W; Trivedi R. Acta Metall, 1987; 35: 967 12Trivedi R, Lipton J, Kurz W Acta Metall, 1987; 35: 965 13Boettinger W J,Coriell A R,Trivedi R In:Mehrabian R.Parrish P A eds,Proc 4th Conf on Rapid Solidification Processing:Principles and Technologies Baton Rouge:Claitors,1987:13 14Wei B, Herlach D M. Mater Sci Eng、 1993 173A: 357# [1] 吴欣强, 戎利建, 谭季波, 陈胜虎, 胡小锋, 张洋鹏, 张兹瑜. 耐Pb-Bi腐蚀Si增强型铁素体/马氏体钢和奥氏体不锈钢的研究进展[J]. 金属学报, 2023, 59(4): 502-512. [2] 梁琛, 王小娟, 王海鹏. 快速凝固Ti-Al-Nb合金B2相形成机制与显微力学性能[J]. 金属学报, 2022, 58(9): 1169-1178. [3] 翟斌, 周凯, 吕鹏, 王海鹏. 自由落体条件下Ti-6Al-4V合金微液滴的快速凝固研究[J]. 金属学报, 2018, 54(5): 824-830. [4] 李金富, 周尧和. 液态金属深过冷快速凝固过程中初生固相的重熔[J]. 金属学报, 2018, 54(5): 627-636. [5] 刘林, 孙德建, 黄太文, 张琰斌, 李亚峰, 张军, 傅恒志. 高梯度定向凝固技术及其在高温合金制备中的应用[J]. 金属学报, 2018, 54(5): 615-626. [6] 吴国华, 陈玉狮, 丁文江. 高性能镁合金凝固组织控制研究现状与展望[J]. 金属学报, 2018, 54(5): 637-646. [7] 朱姜蕾, 王庆, 王海鹏. 深过冷液态金属Cu的热物理性质和原子分布[J]. 金属学报, 2017, 53(8): 1018-1024. [8] 谷倩倩, 阮莹, 朱海哲, 闫娜. 冷却速率对急冷Fe-Al-Nb三元合金凝固组织形成的影响[J]. 金属学报, 2017, 53(6): 641-647. [9] 杨旭, 廖波, 刘坚, 严伟, 单以银, 肖福仁, 杨柯. 中国低活化马氏体钢在液态Pb-Bi中的脆化现象[J]. 金属学报, 2017, 53(5): 513-523. [10] 黄火根,徐宏扬,张鹏国,王英敏,柯海波,张培,刘天伟. 具有反常非晶形成能力的U-Cr二元合金[J]. 金属学报, 2017, 53(2): 233-238. [11] 严军辉,坚增运,朱满,常芳娥,许军锋. 深过冷Al-70%Si合金的凝固特性与微观组织*[J]. 金属学报, 2016, 52(8): 931-937. [12] 刘桐,骆良顺,张延宁,苏彦庆,郭景杰,傅恒志. 定向凝固Al-Y合金组织演化规律及小平面相生长*II. Al-53%Y包晶合金组织演化规律[J]. 金属学报, 2016, 52(7): 866-874. [13] 王中原,何杰,杨柏俊,江鸿翔,赵九洲,王同敏,郝红日. Zr-Ce-Co-Cu难混溶合金的液-液相分离和双非晶相形成*[J]. 金属学报, 2016, 52(11): 1379-1387. [14] 杨柯, 严伟, 王志光, 单以银, 石全强, 史显波, 王威. 核用新型耐高温、抗辐照、耐液态金属腐蚀结构材料——SIMP钢的研究进展*[J]. 金属学报, 2016, 52(10): 1207-1221. [15] 赵雷,江鸿翔,AHMAD Tauseef,赵九洲. Cu-Co-Fe合金雾化合金液滴凝固过程研究*[J]. 金属学报, 2015, 51(7): 883-888. Viewed Full text Abstract Cited   Shared      Discussed