Diffusion controlled process in shock-densified Ti+0.95C green compacts

被引：1

作者：

Lee, JH ^{[1
]}

Thadhani, NN

机构：

[1] Kumamoto Univ, Fac Engn, High Energy Rate Lab, Kumamoto 860, Japan

[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

METALS AND MATERIALS-KOREA | 1998年 / 4卷 / 04期

关键词：

shock-densification; TiC synthesis; diffusion controlled process; avrami kinetics;

D O I：

10.1007/BF03026379

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of combination of "shock-densification" and "reaction synthesis" was investigated to synthesize titanium carbide ceramics. Elemental titanium and graphitic carbon powder mixtures were shock-compressed to make Ti+0.95C compacts (similar to 88+/-2% dense) for subsequent reaction synthesis experiments which were performed in an induction-heated hot press at temperature of 1000 similar to 1300 degrees C, with constant hold time of 60 minutes and a nominal pressure of 34.5 MPa (5000 psi). Experimentally determined titanium carbide formation rates (measured based on depletion of elemental Ti) revealed that the reaction layer growth is controlled by a defect-enhanced diffusion process following the Avrami kinetics, forming a non-stoichiometric TiC0.35-0.58 compound.

引用

页码：676 / 679

页数：4

共 11 条

[1] Diffusion Controlled Process in Shock-Densified Ti+0.95C Green Compacts
Lee, Jong-Heon
Thadhani, Naresh N.
Metals and Materials International, 1998, 4 (04): : 676 - 679
[2] Diffusion controlled process in shock-densified Ti+0.95C green compacts
Jong-Heon Lee
Naresh N. Thadhani
Metals and Materials, 1998, 4 : 676 - 679
[3] Modeling the reaction synthesis of shock-densified titanium-silicon powder mixture compacts
S. A. Namjoshi
N. N. Thadhani
Metallurgical and Materials Transactions B, 2000, 31 : 307 - 316
[4] Modeling the reaction synthesis of shock-densified titanium-silicon powder mixture compacts
Namjoshi, SA
Thadhani, NN
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2000, 31 (02): : 307 - 316
[5] Reaction synthesis mechanism in dynamically densified Ti+C powder compacts
Lee, JH
Thadhani, NN
SCRIPTA MATERIALIA, 1997, 37 (12) : 1979 - 1985
[6] A Model of the Synthesis Processes in Reacting Powder Compacts of Ti- Al, Ti-C Types under Shock Loading
Leitsin, V. N.
Dmitrieva, M. A.
CHEMISTRY FOR SUSTAINABLE DEVELOPMENT, 2005, 13 (02): : 269 - 274
[7] Interfacial microstructure and properties for Ti(C, N)/Ni in diffusion bonding process
Huazhong University of Science and Technology, Wuhan 430074, China
Cailiao Yanjiu Xuebao, 2007, 1 (87-91):
[8] Influences of lubricants on the diffusion bonding properties of assembled green compacts based on Fe-Cu-C materials during sintering
Asaka, Kazuo
Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 1999, 46 (07): : 722 - 726
[9] Defect-enhanced solid-state reaction behavior of shock-modified Ti+C powder mixture compacts
Lee, JH
Thadhani, NN
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1999, 85 (1-3) : 79 - 82
[10] Thermal conductivity effects on steady state propagation speed during self-propagating high-temperature synthesis of Ti+C green compacts
Huque, Z.
Azad, G. M. S.
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2008, 147 (01): : 19 - 26

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