Viscous flow during sintering of attrition milled nanocrystalline titanium powders

被引：18

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 RESEARCH BULLETIN | 2007年 / 42卷 / 07期

关键词：

amorphous materials; nanostructures; surfaces;

D O I：

10.1016/j.materresbull.2006.10.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline powders are expected to exhibit viscous flow during sintering due to presence of substantial amount of quasi-amorphous layers at the grain boundaries. The present investigation attempts to determine the contribution of viscous flow during sintering of nanocrystalline titanium powders. Model equations originally suggested by Frenkel are applied on the shrinkage data to determine the activation energy for viscous flow, frequency factor and the coefficient of viscosity. Nanocrystalline titanium powders were found to exhibit lower activation energy for viscous flow, higher frequency factor and higher coefficient of viscosity as compared to micron sized titanium powders. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1262 / 1268

页数：7

共 13 条

[1]

[Anonymous], 1996, Sintering theory and practice

[2]

Averback RS, 1996, SYNTHESIS AND PROCESSING OF NANOCRYSTALLINE POWDER, P203

[3] NANOCRYSTALLINE MATERIALS [J].

BIRRINGER, R .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1989, 117 :33-43

[4] 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

[5] Synthesis of nanosized titanium powder by high energy milling [J].

Dabhade, VV ;

Mohan, TRR ;

Ramakrishnan, P .

APPLIED SURFACE SCIENCE, 2001, 182 (3-4) :390-393

[6]

David Kingery W., 1976, INTRO CERAMICS, V17

[7]

FECT HJ, 1996, NANOMATERIALS SYNTHE, P89

[8]

Gleiter H., 1992, Nanostructured Materials, V1, P1, DOI 10.1016/0965-9773(92)90045-Y

[9]

Groza Jr, 2002, MA SC PR TE, P115

[10]

MCCORMICK PG, 1999, MATER FORUM, V23, P189

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