A study of the characteristics of Ti(CN) solid solutions

被引：48

作者：

Jung, IJ ^{[1
]}

Kang, SH ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea

来源：

JOURNAL OF MATERIALS SCIENCE | 2000年 / 35卷 / 01期

关键词：

D O I：

10.1023/A:1004740516214

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The activities of TiC and TiN in Ti(CN) solid solutions can be calculated by means of an integration method. In order to obtain accurate activities for a given set of data, two approaches were evaluated. A linear regression with one curve was found to be more proper than a two-curve approach. The activity exhibited a strong negative deviation from ideal solution behavior. The free energy of formation was obtained at given temperatures using the activity values. Isothermal curves of the free energy of formation with respect to composition had a minimum value near Ti(C0.3N0.7) and Ti(C0.6N0.4) at 1700 and 2100 K, respectively. The investigation shows that the Ti(CN) solid solution cannot be treated as a regular solution. Thus, a subregular solution model was introduced to describe the temperature dependence of free energy. (C) 2000 Kluwer Academic Publishers.

引用

页码：87 / 90

页数：4

共 10 条

[1] DETERMINATION OF ACTIVITIES BY MASS SPECTROMETRY .I. LIQUID METALLIC SYSTEMS IRON-NICKEL AND IRON-COBALT [J].

BELTON, GR ;

FRUEHAN, RJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1967, 71 (05) :1403-&

[2]

DARKEN LS, 1967, T METALL SOC AIME, V239, P80

[3]

DOI A, 1985, P 11 INT PLANS SEM T, P825

[4]

GASKELL DR, 1981, INTRO METALLURGICAL, P348

[5] A SUB-REGULAR SOLUTION MODEL AND ITS APPLICATION TO SOME BINARY ALLOY SYSTEMS [J].

HARDY, HK .

ACTA METALLURGICA, 1953, 1 (02) :202-209

[6]

JUNG IJ, 1999, IN PRESS ACTA MAT

[7] Stability of N in Ti(CN) solid solutions for cermet applications [J].

Kang, S .

POWDER METALLURGY, 1997, 40 (02) :139-142

[8] STABILITY OF TRANSITION METAL CARBIDES AGAINST N2 UP TO 300 ATM [J].

KIEFFER, R ;

NOWOTNY, H ;

ETTMAYER, P ;

FREUDHOF.M .

MONATSHEFTE FUR CHEMIE, 1970, 101 (01) :65-&

[9]

Kieffer R., 1971, MODERN DEV POWDER ME, V5, P201

[10] THERMODYNAMICS OF LIQUID AG-AU AND AU-CU ALLOYS AND THE QUESTION OF STRAIN ENERGY IN SOLID SOLUTIONS [J].

ORIANI, RA .

ACTA METALLURGICA, 1956, 4 (01) :15-25

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