金属学报  1990, Vol. 26 Issue (3): 119-125

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过冷液态金属热力学性质的变分计算

沈涛;王景唐

中国科学院金属研究所快速凝固非平衡合金实验室;中国科学院金属研究所快速凝固非平衡合金实验室;研究员;沈阳(110015)

VARIATIONAL CALCULATION OF THERMODYNAMIC PROPERTIES OF SUPERCOOLED LIQUID METALS

SHEN Tao; WANG Jingtang Institute of Metal Research Academia Sinica; Laboratory of Rapidly Solidified Non-Equilibrium Alloys; Shenyang professor

沈涛;王景唐. 过冷液态金属热力学性质的变分计算[J]. 金属学报, 1990, 26(3): 119-125.
, . VARIATIONAL CALCULATION OF THERMODYNAMIC PROPERTIES OF SUPERCOOLED LIQUID METALS[J]. Acta Metall Sin, 1990, 26(3): 119-125.

摘要 参考文献 相关文章 Metrics 全文: PDF(569 KB)   摘要: 本文用Gibbs-Bogoliubov热力学变分计算方法,以硬球(HS)体系为参考体系,对第Ⅲ族中Al,Ga,Tl及过渡金属Ti进行了过冷液态热力学性质的计算,算出平均原子体积Ω,Helmholtz自由能F,内能E及熵S,并得到等容比热c_ν;等温体弹性模量B_T,热膨胀系数α_p和等压比热c_p.从c_p-T曲线得到非晶转变温度T_g。T_r(=Tg/Tm)的理论值表明了金属形成非晶的能力,和实验结果相符。 关键词 ： 过冷液态金属,  硬球体系,  热力学变分计算,  等压比热,  玻璃转变温度     Abstract：By means of the Gibbs-Bogoliubov (GB) thermodynamical variationalcalculation, the thermodynamical properties of the liquid metals as supercooled sta-te, such as Al, Ga, Tl in the 3rd family of periodic table and transition metal Tiwere calculated using the hard-sphere (HS) system as reference. The values of meanatomic volume, Helmholtz free energy, internal energy and entropy as well asspecific heat at constant volume, isothermal bulk modulus, thermal expansion co-efficient and specific heat under constant pressure were determined. The glass tran-sition temperature, T_g, is easily obtained from c_p-T plot. The glass forming abili-ty for metal can be predicted with T_g/T_m, which is in agreement with the experi-mental results. Key words： supercooled metal    hard-sphere system    thermodynamic variational calculation    specific heat    glass transition temperature 收稿日期: 1990-03-18      基金资助:国家自然科学基金,编号:86050282 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 沈涛 王景唐 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1990/V26/I3/119 1 Klinger M I. Phys Rep, 1988; 165: 275 2 Jaeckle J. Rep Prog Phys, 1986; 49: 171 3 Shimoji M. Liquid Metals, New York: Academic Press, 1977 4 Heine V. Solid State Phys, 1970; 24: 1 5 Li D H, Li X R, Wang S. J Phys, 1986; F16: 309 6 Woo C H, Wang S, Matsuura M. J Phys, 1975; F5: 1836 7 Li D H, Moore R A, Wang S. Can J Phys, 1986; 64: 75 Li D H, Moore R A, Wang S. Can J Phys, 1986; 64: 852 8 Li D H, Moore R A, Wang S. J Chem Phys, 1988; 88: 2700 Li D H, Moore R A, Wang S. J Chem Phys, 1988; 89: 4309 9 Ashcroft N W, Lekner J. Phys Rev, 1966; 145: 83 10 Hultgren R, Desai P D, Hawkins D T, Gleiser M, Kelley K K, Wagman D D. Selected Values of the Thermodynamic Properties of the Elements, Ohio: ASM, 1973 11 Brandes E A. Smithells Metals Reference Book. 6th ed, London: Butterworth, 1983 12 Cohen M H, Grest G S. Phys Rev, 1979; B20: 1077| [1] 贾婷婷,坚增运,许军锋,朱满,常芳娥. Ge30Se70硫系玻璃的特征温度和性能*[J]. 金属学报, 2016, 52(6): 755-760. [2] 蒋青;徐晓亚;赵明. Vogel—Fulcher定律与玻璃转变温度的关系[J]. 金属学报, 1997, 33(7): 763-768. Viewed Full text Abstract Cited   Shared      Discussed