Thermodynamic activity of Ga in Ni3Ga (Reprinted from Journal of the Japan Institute of Metals, vol 64, pg 202-206, 2000)

被引：0

作者：

Kushida, A ^{[1
]}

Ikeda, T ^{[1
]}

Numakura, H ^{[1
]}

Koiwa, M ^{[1
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

来源：

MATERIALS TRANSACTIONS | 2001年 / 42卷 / 03期

关键词：

electromotive-force measurements; solid electrolyte; galvanic cell; thermodynamic activity; intermetallic compound; inter-atomic interaction energy; thermodynamic factor in diffusion;

D O I：

10.2320/matertrans.42.514

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermodynamic activity of Ca in the Lit-ordered intermetallic phase Ni3Ga has been determined by measuring the electromotive force of a galvanic cell with zirconia solid-electrolyte, Ni-Ga, Ga2O3/ZrO2(+Y2O3)/Ga, Ga2O3 in the temperature range between 1050 and 1300K for six compositions. The activity of Ga varies with composition most steeply at the stoichiometric composition (25 mol%Ga), the dependence being more pronounced at low temperatures. By applying a thermodynamic model based on the Bragg-Williams approximation (Ikeda et ral.: Acta Mater. 46 (1998) 6605-6613), the effective pair interaction energy between Ni and Ga atoms has been determined to be 9.75 +/- 0.19 kJ/mol. The thermodynamic factor in chemical diffusion in the L1(2) phase has been derived from the composition dependence of the thermodynamic activity.

引用

页码：514 / 519

页数：6

共 5 条

[1] Electron bean weldability of pure magnesium and AZ31 magnesium alloy (Reprinted from Journal of Japan Institute of Light Metals, vol 50, pg 512-517, 2000)
Asahina, T
Tokisue, H
MATERIALS TRANSACTIONS, 2001, 42 (11) : 2345 - 2353
[2] Effects of defects and Fe intermetallic compounds on fatigue properties of Al-Si-Cu-Mg alloy castings (Reprinted from Journal of Japan Institute of Light Metals, vol 50, pg 116-120 2000)
Kuroki, Y
Tanaka, T
Sato, T
Kamio, A
MATERIALS TRANSACTIONS, 2001, 42 (11) : 2339 - 2344
[3] Influence of ultrasound on corrosion behavior of SUS304 stainless steel with crevice (Reprinted from Journal of Japan Institute of Metals, vol 71, pg 511-516, 2007)
Wang, Rongguang
Kido, Mitsuo
MATERIALS TRANSACTIONS, 2008, 49 (08) : 1806 - 1811
[4] Effect of carbon powder on grain refinement of an AZ91E magnesium alloy (Reprinted from Journal of Japan Institute of Light Metals, vol 51, pg 599-603, 2001)
Yano, E
Tamura, Y
Motegi, T
Sato, E
MATERIALS TRANSACTIONS, 2003, 44 (01) : 107 - 110
[5] Friction bonding of silicon carbide to oxygen-free copper with an intermediate layer of reactive metal (reprinted from Journal of the Japan Institute of Metals, vol 65, pg 895-904, 1999)
Nishimoto, A
Ando, M
Takahashi, M
Aritoshi, M
Ikeuchi, K
MATERIALS TRANSACTIONS JIM, 2000, 41 (12): : 1636 - 1645

← 1 →