Microwave Sintering of W-18Cu and W-7Ni-3Cu Alloys
Microwave Sintering of W-18Cu and W-7Ni-3Cu Alloys
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DOI：
10.1080/08327823.2008.11688598
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发表时间：
2008-01
影响因子：
1.5
通讯作者：
A. Mondal;A. Upadhyaya;D. Agrawal
中科院分区：
文献类型：
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作者：
A. Mondal;A. Upadhyaya;D. Agrawal
微波处理是一种创新和高效的材料处理方法，与传统方法相比具有许多优点，特别是在烧结应用中。它具有省时、节能、升温速度快、加工周期短、温度低、显微组织细小、机械性能好等优点，从而提高了产品的性能。传统的钨及其合金等耐火材料烧结的主要制约因素是烧结温度高、保温时间长，会导致异常的晶粒长大和力学性能差。较小的(亚微米和纳米)钨粉末尺寸会进一步加剧这些问题。这项研究介绍了最新的研究成果：利用微波加热成功地固结了W-18Cu和W-7Ni-3Cu合金，总体上使烧结时间缩短了80%。与常规烧结样品相比，微波烧结样品具有更细小的显微组织和更好的力学性能。
Microwave processing is emerging as an innovative and highly effective material processing method offering many advantages over conventional methods, especially for sintering applications. It is recognized for its various advantages, such as: time and energy saving, rapid heating rates, considerably reduced processing cycle time and temperature, fine microstructures and improved mechanical properties which lead to better product performance. Major constraints in conventional sintering of refractory material such as tungsten and its alloys are high sintering temperatures and long soaking times which cause abnormal grain growth and lead to poor mechanical properties. They get further aggravated at smaller (submicron and nano) tungsten powder sizes. This study describes recent research findings; W-18Cu and W-7Ni-3Cu alloys have been successfully consolidated using microwave heating which resulted in an overall reduction of sintering time of up to 80%. The microwave sintered samples exhibited finer microstructure and superior mechanical properties when compared with the conventional samples.