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首页> 外文期刊>Journal of Materials Engineering and Performance >Sintering Behavior of Al/B_4C-AlB_(12)-Al_2O_3 Nanostructure Composite Synthesized by In Situ Processing Method
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Sintering Behavior of Al/B_4C-AlB_(12)-Al_2O_3 Nanostructure Composite Synthesized by In Situ Processing Method

机译：原位加工法合成Al / B_4C-AlB_（12）-Al_2O_3纳米结构复合材料的烧结行为

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摘要

The aim of this article is to study the effect of time and temperature of sintering on the properties and microstructure of Al/B_4C-AlB_(12)-Al_2O_3 nanocomposite synthesized via in situ processing method. In this method, a mixture of Al-B_2O_3-C, as starting materials, was activated and reacted in a planetary ball mill under Argon atmosphere. The phase analysis, morphology, and particles size were studied by x-ray diffraction and scanning electron microscopy methods. The composite powders were compressed with uniaxial cold press and then were sintered at different temperatures (470-600℃) for various times (30-90 min). The density, hardness, and compressive strength of sintered samples were investigated. The results revealed that by increasing the sintering temperature and sintering time, both hardness and compaction strength of nanocomposite reach to maximum at 560℃. The results showed that the sample sintered at 560℃ for 90 min had highest sintered density (≈2590 kg/m~3) and highest hardness value of ～88 BHN with compaction strength of ～313 MPa. Nanosize and homogeneous distribution of in situ formed ceramic particles were observed in the synthesized composite.
机译：本文的目的是研究烧结时间和温度对原位合成Al / B_4C-AlB_（12）-Al_2O_3纳米复合材料的性能和微观结构的影响。在该方法中，作为原料的Al-B_2O_3-C的混合物在氩气气氛下在行星式球磨机中活化并反应。通过X射线衍射和扫描电子显微镜方法研究了相分析，形态和粒径。用单轴冷压机压缩复合粉末，然后在不同温度（470-600℃）下烧结不同时间（30-90分钟）。研究了烧结样品的密度，硬度和抗压强度。结果表明，通过提高烧结温度和烧结时间，纳米复合材料的硬度和压实强度在560℃达到最大值。结果表明，在560℃下烧结90min的样品具有最高的烧结密度（≈2590kg / m〜3）和最高的硬度值〜88 BHN，压实强度为〜313 MPa。在合成的复合物中观察到原位形成的陶瓷颗粒的纳米尺寸和均匀分布。

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