Combustion synthesis of complex carbohydrides in the Ti-Nb-W-C-H system

被引：1

作者：

Aghajanyan, N.N. ^{[1
]}

Dolukhanyan, S.K. ^{[1
]}

机构：

[1] Nalbandyan Institute of Chemical Physics, National Academy of Sciences, Yerevan 0014

来源：

International Journal of Self-Propagating High-Temperature Synthesis | 2012年 / 21卷 / 01期

关键词：

complex carbides; complex carbohydrides; SHS;

D O I：

10.3103/S1061386212010025

中图分类号：

学科分类号：

摘要：

Combustion of Ti-Nb-W-C blends in hydrogen and argon was explored. The synthesis of Ti-Nb-W-C complex carbohydrides from xTi + (1 - x)(Nb + W) + yC mixtures (0.6 ≤ x ≤ 0.8; 0.4 ≤ y ≤ 0.8) was performed in a one-stage process. For combustion in argon, (a) no mutual dissolution of niobium and titanium carbides was observed and (b) a small amount of W was not involved in combustion and carbide formation. For combustion in hydrogen, a predominant product phase was the Ti- and Nb-based complex (bimetallic) carbohydride with fcc structure. In some cases (depending on metals ratio) a small admixture of the Nb 2C phase was detected. The combustion in hydrogen accompanied by mutual dissolution of carbides formed in the combustion wave was found to yield new hydrogen-containing and easily dispersible carbides with a low amount of free W. © 2012 Allerton Press, Inc.

引用

页码：7 / 10

页数：3

共 6 条

[1]

Aghajanyan N.N., Dolukhanyan S.K., Combustion in the Zr-Nb-C-H System, Fiz. Goreniya Vzryva, 26, 5, pp. 33-36, (1990)

[2]

Aghajanyan N.N., Dolukhanyan S.K., Influence of Reaction Medium on Combustion in the Zr-Nb-C System, Fiz. Goreniya Vzryva, 32, 2, pp. 31-37, (1996)

[3]

Dolukhanyan S.K., Aghajanyan N.N., Hakobyan H.G., Shekhtman V.S., Ter-Galstyan O.P., Structural peculiarities of the transition metals carbohydrides produced by combustion synthesis, Journal of Alloys and Compounds, 293, pp. 452-457, (1999)

[4]

Dolukhanyan S.K., Aghajanyan N.N., Preparation of Compact Carbides and Carbohydrides Based on Titanium and Vanadium (ICHMS'2007), pp. 743-750, (2008)

[5]

Dolukhanyan S.K., Aleksanyan A.G., Abrahamyan K.A., Mardanyan S.S., Shekhtman V.Sh., Karpov M.I., Korzhov V.P., Formation of Porousless Compact Produces from Hydrides of Refractory Metals (ICHMS'2007), pp. 795-803, (2008)

[6]

Latergaus I.S., Em V.T., Karimov I., Khvatinskaya D.B., Dolukhanyan S.K., Neutronographic Investigation of Cubic Titanium Carbohydrides with Deficient Nonmetal Sublattice, Neorg. Mater., 20, 10, pp. 1648-1651, (1984)

← 1 →