Phase transformation of alumina induced by high pressure spark plasma sintering (HP-SPS)
Phase transformation of alumina induced by high pressure spark plasma sintering (HP-SPS)
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DOI：
10.1016/j.scriptamat.2018.08.016
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发表时间：
2019-01-01
影响因子：
6
通讯作者：
Largeteau, Alain
中科院分区：
文献类型：
--
作者：
Balima, Felix;Largeteau, Alain
研究了γ - al2o3纳米晶在5 GPa高压下的放电等离子烧结。绘制了α - al2o3和γ - al2o3相的SPS压力/温度图。采用室内高压火花等离子烧结设备（HP-SPS）。与传统的高压高温烧结（HP-FIT）相比，该设备的性能和参数控制大大降低了陶瓷的相变和烧结温度。转变温度可以从1gpa降低到500℃左右。HP-SPS烧结保留了陶瓷中的晶粒生长。用HP-SPS对其密度进行了优化。(C) 2018由Elsevier Ltd代表Acta Materialia Inc出版。
Spark plasma sintering of nanocrystalline gamma-Al2O3 at very high pressure was investigated up to 5 GPa. A SPS pressure/temperature diagram of alpha-Al2O3 and gamma-Al2O3 phase was plotted. An in-house high pressure spark plasma sintering equipment (HP-SPS) was used. The capabilities and parameters control of this equipment greatly reduced the phase transition and sintering temperatures to obtain ceramics in contrast to conventional high pressure and high temperature sintering (HP-FIT). The transition temperature could be lowered to similar to 500 degrees C from 1 GPa. The grain growth in ceramic was retained by the HP-SPS sintering. The density was also demonstrated to be optimized with HP-SPS. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.