On Joule heating during spark plasma sintering of metal powders

被引:65
作者
Chawake, Niraj [1 ]
Pinto, Linford D. [2 ]
Srivastav, Ajeet K. [1 ]
Akkiraju, Karthik [1 ]
Murty, B. S. [1 ]
Kottada, Ravi Sankar [1 ]
机构
[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
[2] BMS Coll Engn, Dept Mech Engn, Bangalore 560019, Karnataka, India
关键词
Spark plasma sintering; Joule heating; Electrical resistivity; Densification; ELECTRIC-FIELD; TEMPERATURE DISTRIBUTION; GROWTH; CERAMICS; PRESSURE; COMPACTS; SPS; CONSOLIDATION; CONDUCTIVITY; RESISTIVITY;
D O I
10.1016/j.scriptamat.2014.09.003
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Joule heating as a primary heating source mechanism was probed during spark plasma sintering (SPS) of pure metal powders (Fe, Ni and Cu). Resistance to electric path was estimated from voltage-current measurements obtained online during these experiments. Resistance was observed to saturate at the same value irrespective of the type of metal powder, after attaining a sintering temperature of similar to 0.3T(m). This saturation in resistance is attributed primarily to the Joule heating that occurs at the graphite-foil and punch in an SPS system. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:52 / 55
页数:4
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