金属学报  1996, Vol. 32 Issue (4): 357-362

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液态Ni-Fe合金的超过冷与热力学性质

魏炳波;董长星

西北工业大学

HYPERCOOLING AND THERMODYNAMIC PROPERTIES OF LIQUID Ni-Fe ALLOYS

WEI Bingbo; DONG Changxing(Northwestern Polytechnical University; Xi'an 710072)(Manuscript received 1995-09-25)

魏炳波;董长星. 液态Ni-Fe合金的超过冷与热力学性质[J]. 金属学报, 1996, 32(4): 357-362.
, . HYPERCOOLING AND THERMODYNAMIC PROPERTIES OF LIQUID Ni-Fe ALLOYS[J]. Acta Metall Sin, 1996, 32(4): 357-362.

摘要 参考文献 相关文章 Metrics 全文: PDF(464 KB)   摘要: 采用熔融玻璃净化法使液态Ｎｉ－１０％Ｆｅ和Ｎｉ－３５％Ｆｅ合金过冷度分别达到３７１（０．９０△Ｔ＿ｈ）和３４３Ｋ（０．９１△Ｔ＿ｈ）．实验测得其超过冷临界过冷度△Ｔｈ分别为４１３和３７６Ｋ．根据超过冷的定义导出一种测定深过冷熔体平均比热容的方法，从而得到两种深过冷合金的比热容为４１．０和４０．７Ｊ／（ｍｏｌ·Ｋ）．据此对快速凝固过程中的焓变△Ｈ＿（ＬＳ），熵变△Ｓ＿（ＬＳ），相变驱动力△Ｇ＿（ＬＳ）以及晶体形核率Ⅰ进行了理论计算．发现尽管过冷度超过了０．２Ｔ＿Ｌ，液态合金仍然发生异质形核． 关键词 ： 超过冷,  液态金属,  热力学性质,  快速凝固,  Ｎｉ－Ｆｅ合金     Abstract：Ni-10% Fe and Ni-35% Fe alloy melts were undercooled with glass fluxing technique by 371 (0. 90 △T_h) and 343 K (0. 91 △T_h) .Their hypercooling limits △T_h were determined to be 413 and 376 K respectively. A new method to measure the integral mean specific heat C_(pL) of undercooled metallic melts was developed according to the definition of hypercooling. That is, one can take C_(pL) as the ratio of latent heat of fusion △H_m to hypercooling limit △T_h, provided that the latter two physical parameters have been obtained through experiments. The C_(pL) values of the above Ni-Fe alloys were found to be 41. 0 and 40. 7 J/ (mol . K). Theoretical calculations were also carried out to reveal the relationships of enthalpy change △H_(LS), entropy change △S_(LS), Gibbs free energy change △G_(LS) and crystal nucleation rate I during rapid solidification vs undercooling. Although the maximum undercoolings achieved by both Ni-Fe alloys have exceeded the critical level of 0-2 T_L, the calculated results indicate that heterogeneous nucleation must have taken place in preference to homogeneous nucleation. Those heterogeneous nucleants with a wetting angle range of 53°< θ< 80°played the dominating role to prevent Ni-Fe alloys from further approaching their hypercooling limits. Correspondent: WEI Bingbo, professor, (Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072) Key words： liquid metal    hypercooling    undercooling    thermodynamic property    Ni-Fe alloy 收稿日期: 1996-04-18      基金资助:国家杰出青年科学基金;;国家自然科学基金;;国家教委优秀青年教师基金 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 魏炳波 董长星 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1996/V32/I4/357 1SahmPR,KellerMH,SchieweB．ResearchProgramof theGermanSpacelabMissionD-2．2nded,Kln,Germany:WissenschaftlicheProjecktfhrung//DLR,1993:3632EvansND,HofmeisterWH,BayuzickRJ,RobinsonMB．MetallTrans,1986;17A:9733WeiB,HerlachDM,FeuerbacherB,SommerF．ActaMetallMater,1993;41:18014GomersallDW,ShiraishiSY,WardRG．JAustInstMet,1965;10:2205WillneckerR,HerlachDM,FeuerbacherB．ApplPhysLett,1986;49:13396HofmeisterWH,RobinsonMB,BayuzickRJ．MaterResSocSympProc,1987;87:1497魏炳波,杨根仓,周尧和.金属学报,1990;26:B3438TurnbullD,JChemPhys,1952;20:4119魏炳波,王彬,BarthM,HerlachDM．金属学报,1994;30:B289 [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] 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. [5] 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. [6] 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. [7] 崔荣华, 王歆钰, 董正超, 仲崇贵. Mg1-xZnx合金的弹性和热力学性质的第一性原理研究[J]. 金属学报, 2017, 53(9): 1133-1139. [8] 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. [9] 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. [10] 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. [11] 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. [12] 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. [13] 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. [14] 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. [15] 闫学伟,唐宁,刘孝福,税国彦,许庆彦,柳百成. 镍基高温合金铸件液态金属冷却定向凝固建模仿真及工艺规律研究[J]. 金属学报, 2015, 51(10): 1288-1296. Viewed Full text Abstract Cited   Shared      Discussed