Initial sintering kinetics of attrition milled nanocrystalline titanium powders

被引：14

作者：

Dabhade, V. V. ^{[1
]}

Mohan, T. R. Rama ^{[1
]}

Ramakrishnan, P. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 452卷

关键词：

nanocrystalline; titanium; sintering kinetics; activation energy; boundary enhanced diffusion; diffusion coefficients;

D O I：

10.1016/j.msea.2006.10.097

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In recent years there has been considerable interest in the dominant mass transport mechanisms operating during sintering of nanocrystalline powders. The present investigation deals with these mass transport mechanisms in nanocrystalline titanium powders. Sintering studies have been carried out by dilatometry of the powder compacts using a constant rate of heating (CRH) and employing model equations for the initial sintering portion. The shrinkage values obtained by heating the specimens at a constant rate of heating (CRH) to various temperatures were analyzed using Young and Curlers equations and a model proposed by Johnson and Berrin. Based on the analysis of experimental data, mechanisms are proposed for the initial sintering of nanocrystalline titanium powders. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：386 / 394

页数：9

共 32 条

[1] INCREASE OF SINTERING RATE OF TITANIUM POWDER DURING CYCLIC PHASE-TRANSFORMATION [J].

AKECHI, K ;

HARA, Z .

POWDER METALLURGY, 1981, 24 (01) :41-46

[2]

ANDRIEVSKI RA, 1994, INT J POWDER METALL, V30, P59

[3]

[Anonymous], 1996, Sintering theory and practice

[4]

BERRIN L, 1967, SINTERING RELATED PH, P445

[5]

BRANDES EA, 1995, SMITHELLS METALS REF

[6] Dilatometry of attrition milled nanocrystalline titanium powders [J].

Dabhade, Vikram V. ;

Panigrahi, B. B. ;

Godkhindi, M. M. ;

Mohan, T. R. Rama ;

Ramakrishnan, P. .

MATERIALS RESEARCH BULLETIN, 2006, 41 (11) :2111-2122

[7] SELF-DIFFUSION IN BETA-TITANIUM AND BETA-HAFNIUM [J].

DERECA, NEW ;

LIBANATI, CM .

ACTA METALLURGICA, 1968, 16 (10) :1297-+

[8] Diffusion controlled creep in nanocrystalline materials under grain growth [J].

Estrin, Y ;

Gottstein, G ;

Shvindlerman, LS .

SCRIPTA MATERIALIA, 2004, 50 (07) :993-997

[9]

Groza Jr, 2002, MA SC PR TE, P115

[10]

GROZA JR, 1999, PERGAMON MAT SERIES, P347

← 1 2 3 4 →