Densification and shape distortion in liquid-phase sintering

Densification and dimensional control are important aspects of liquid-phase sintering. The capillary force and the solid bonding affect both densification and shape preservation. Capillarity, which is orientated isotropically, causes uniform shrinkage and holds grains together to preserve the compon...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 1999-12, Vol.30 (12), p.3211-3217
Main Authors: JIANXIN LIU, GERMAN, R. M
Format: Article
Language:English
Subjects:
Applied sciences
BONDING
BULK DENSITY
CAPILLARIES
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Grain boundaries
III-V semiconductors
LIQUID METALS
MATERIALS SCIENCE
Metals. Metallurgy
Other semiconductors
Physics
SHAPE
SHRINKAGE
SINTERING
Specific materials
Surface tension
TUNGSTEN BASE ALLOYS
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Summary:Densification and dimensional control are important aspects of liquid-phase sintering. The capillary force and the solid bonding affect both densification and shape preservation. Capillarity, which is orientated isotropically, causes uniform shrinkage and holds grains together to preserve the component shape in the early stage of sintering. On the other hand, solid bonding resists viscous flow and inhibits densification and shape distortion. The capillary force decreases with densification and approaches zero as pores are eliminated. Thus, shape retention eventually requires solid-grain bonding. The solid-grain bonding provides compact rigidity, which is represented by compact strength. Shape distortion occurs when the compact loses its strength. For every situation, there is a critical compact strength above which no shape distortion occurs. Distortion in liquid-phase sintering indicates that the compact strength passed below a critical level. [PUBLICATION ABSTRACT]
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-999-0231-5