Properties and densification of nanocrystalline MoSi_2-Si_3N_4 composite from mechanically alloyed powders by pulsed current-activated sintering

In-Young Ko; Hyun-Su Kang; Jung-Mann Doh; Jin-Kook Yoon; In-Jin Shon

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Properties and densification of nanocrystalline MoSi_2-Si_3N_4 composite from mechanically alloyed powders by pulsed current-activated sintering

机译：机械合金化粉末通过脉冲电流激活烧结法制备纳米晶MoSi_2-Si_3N_4复合材料的性能和致密化

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Nanosized MoSi_2 and Si_3N_4 powders were synthesized from MO_2N and Si powders by high-energy ball milling. A dense nanocrystalline MoSi_2-Si_3N_4 composite was consolidated using the pulsed current-activated sintering (PCAS) method within 3 min period from the mechanically activated MoSi_2 and Si_3N_4 powders. A highly dense MoSi_2-Si_3N_4 composite, with relative density of up to 97%, was produced under the simultaneous application of 80 MPa pressure and 2800 A pulsed current. The mean grain size,hardness, and fracture toughness of the composite were investigated.

机译：通过高能球磨从MO_2N和Si粉中合成了纳米级的MoSi_2和Si_3N_4粉。使用脉冲电流活化烧结（PCAS）方法在3分钟内从机械活化的MoSi_2和Si_3N_4粉末中固结了致密的纳米晶MoSi_2-Si_3N_4复合材料。在同时施加80 MPa压力和2800 A脉冲电流的条件下，生产出了相对密度高达97％的高密度MoSi_2-Si_3N_4复合材料。研究了复合材料的平均晶粒度，硬度和断裂韧性。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2010年第1期|共4页
作者
In-Young Ko; Hyun-Su Kang; Jung-Mann Doh; Jin-Kook Yoon; In-Jin Shon;
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正文语种 eng
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Powder metallurgy; Sintering; Nanostructured materials; Mechanical properties;

机译：粉末冶金;烧结;纳米结构材料;力学性能;

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机译：脉冲电流烧结固结纳米晶钨重合金粉末的制备与性能

Properties and densification of nanocrystalline MoSi_2-Si_3N_4 composite from mechanically alloyed powders by pulsed current-activated sintering

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