Chemically activated SHS in synthesis of refractory carbide powders

被引：14

作者：

Kharatyan, SL ^{[1
]}

Nersisyan, HH ^{[1
]}

机构：

[1] NAS RA, Nalbandyan Inst Chem Phys, Yerevan 375044, Armenia

来源：

PROGRESS IN SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS | 2002年 / 217卷

关键词：

carbide; chemical activation; combustion synthesis; halogen-containing additives;

D O I：

10.4028/www.scientific.net/KEM.217.83

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanism of combustion in simple and complex carbide systems as Me - C (where Me - Ti, W, Mo, Cr, Nb, etc.) and SiO2-Al-C in the presence of halogen-containing organic additives is investigated. It is shown that the halogenides of metals, which form during combustion strongly intensify process of mass transfer and promote proceeding of carbidization at rather low temperatures, including the low-exothermic and hard burning systems. Phenomenon and effects earlier unknown in SHS are found out and investigated. Macrokinetic peculiarities of combustion for carbide systems under the conditions of activation and main advantages of the approach offered are revealed.

引用

页码：83 / 91

页数：9

共 17 条

[1]

Abovyan LS, 1995, CHEM PHYS REP+, V13, P1740

[2]

[Anonymous], INT J SHS

[3]

GNESIN GG, 1977, SILICON CARBIDE BASE

[4]

KHAIKIN BI, 1979, DOKL AKAD NAUK SSSR+, V245, P155

[5]

Martirosyan N. A., 1983, FIZ GOREN VZRYVA, V19, P39

[6]

MERZHANO.AG, 1972, DOKL AKAD NAUK SSSR+, V204, P366

[7]

Merzhanov A. G., 1998, COMBUSTION PROCESSES

[8] Combustion processes that synthesize materials [J].

Merzhanov, AG .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1996, 56 (1-4) :222-241

[9]

NERSISYAN GA, 1990, DOKL AKAD NAUK SSSR+, V314, P891

[10]

Nersisyan H. H., 1995, International Journal of Self-Propagating High-Temperature Synthesis, V4, P159

← 1 2 →