Characterization of Ni_xCo_(1-x)O/ZrO_2(CaO) directionally solidified eutectic (DSE) ceramic composites with a ductile interphase

Nasim Alem; Vinayak P. Dravid; Shuyou Li

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Characterization of Ni_xCo_(1-x)O/ZrO_2(CaO) directionally solidified eutectic (DSE) ceramic composites with a ductile interphase

机译：延性相间Ni_xCo_（1-x）O / ZrO_2（CaO）定向凝固共晶（DSE）陶瓷复合材料的表征

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Ni_xCo_(1-x)O/ZrO_2 (CaO) directionally solidified eutectics (DSEs) form a ductile metallic interphase after they are chemically reduced at high temperatures. Vickers indentation tests have previously shown a significant change in the crack propagation behavior of the reduced composites due to plastic deformation and strain energy absorption mechanisms operating in the system after reduction. This paper focuses on structural and chemical characterization of Ni_xCo_(1-x)O/ZrO_2(CaO) DSEs after reduction. Analytical transmission electron microscopy techniques such as energy dispersive x-ray spectroscopy (EDXS) and electron energy loss spectroscopy (EELS) show elimination of oxygen and formation of nanoscale Ni(Co) solid.

机译：Ni_xCo_（1-x）O / ZrO_2（CaO）定向凝固的低共熔物（DSE）在高温下化学还原后形成易延展的金属界面。先前的维氏压痕测试表明，由于还原后系统中运行的塑性变形和应变能吸收机制，还原后的复合材料的裂纹扩展行为发生了显着变化。本文重点研究了还原后的Ni_xCo_（1-x）O / ZrO_2（CaO）DSE的结构和化学表征。诸如能量色散X射线光谱（EDXS）和电子能量损失光谱（EELS）的分析型透射电子显微镜技术显示出氧气的消除和纳米级Ni（Co）固体的形成。

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来源
《Journal of Materials Research》 |2007年第7期|p.1797-1805|共9页
作者
Nasim Alem; Vinayak P. Dravid; Shuyou Li;
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作者单位

Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Characterization of Ni_xCo_(1-x)O/ZrO_2(CaO) directionally solidified eutectic (DSE) ceramic composites with a ductile interphase

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