Densification Behavior in Spark-Plasma-Sintering of MgAl2O4 Spinel

被引：0

作者：

Morita, Koji ^{[1
]}

Kim, Byung-Nam ^{[1
]}

Yoshida, Hidehiro ^{[1
]}

Hiraga, Keijiro ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PRICM 7, PTS 1-3 | 2010年 / 654-656卷

关键词：

Spark-Plasma-Sintering (SPS); densification mechanism; spinel; MAGNESIUM ALUMINATE SPINEL; POLYCRYSTAL; MECHANISM; PRESSURE;

D O I：

10.4028/www.scientific.net/MSF.654-656.1986

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 densification mechanism in park-plasma-sintering (SPS) processing was examined in MgAl(2)O(4) spinel. As the relative density rho(t) increases, that is, as the effective stress sigma(eff) decreases, stress exponent n evaluated from effective stress-densification rate relationship continuously varies from n >= 4 to n approximate to 1. TEM observation shows that significant stacking faults caused by partial dislocations are frequently observed in the low rho(t) region. The results suggest that, for spinel, the predominant densification mechanism in SPS processing changes with rho(t) from plastic flow by a partial dislocation motion in the low rho(t) region (n >= 4) to diffusion-related creep in the high rho(t) region (n approximate to 1)

引用

页码：1986 / 1989

页数：4

共 15 条

[1] Phenomenological analysis of densification mechanism during spark plasma sintering of MgAl2O4 [J].