• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Powder metallurgy world congress amp; exhibition >Novel Rapid Discharge Sintering Technique for Damage Free Diamond MMCs
【24h】

Novel Rapid Discharge Sintering Technique for Damage Free Diamond MMCs

机译：用于无损金刚石MMC的新型快速放电烧结技术

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study compares the performance of metal matrix composites (MMC) sintered using a novel microwave plasma processing technique called Rapid Discharge Sintering (RDS) and conventional tube furnace sintering. The MMC composites were prepared from nickel-diamond powder mixtures containing 1 urn nickel and 6-12 μm diamond powders. These mixtures were pressed uni-axially at compaction pressures of 300 MPa. The samples were sintered using both the furnace and RDS treatments at temperatures between 850 and 1050°C. The tube furnace sintering study was carried out in argon gas at atmospheric pressure. The RDS treatments were carried out at 20 mbar in plasmas containing hydrogen or hydrogenitrogen gases. The addition of nitrogen gas to the hydrogen plasma facilitated a substantial increase in composite firing temperatures. The sintered nickel-diamond composites were characterised based on density measurements, flexural strength, SEM and XRD, analysis. A significantly reduction in sintering times were achieved using the RDS technique for which firing process takes 10 minutes, compared with several hours for the tube furnace treatments. A further advantage of the RDS treatments was the absence of any peaks in the XRD spectrum of the sintered composites associated with diamond graphitization. These peaks were observed for the furnace treated composites indicating some graphitization of the diamond during the sintering process.
机译：这项研究比较了使用一种称为快速放电烧结（RDS）的新型微波等离子体处理技术和常规管式炉烧结的金属基复合材料（MMC）的烧结性能。 MMC复合材料由含1镍和6-12μm金刚石粉的镍-金刚石粉末混合物制备。将这些混合物在300MPa的压制压力下单轴压制。使用炉和RDS处理在850至1050°C的温度下烧结样品。管式炉的烧结研究是在大气压的氩气中进行的。 RDS处理是在20 mbar的含氢气或氢气/氮气的等离子体中进行的。向氢气等离子体中添加氮气有助于大大提高复合材料的焙烧温度。基于密度测量，弯曲强度，SEM和XRD，分析来表征烧结的镍-金刚石复合材料。使用RDS技术可以大大减少烧结时间，而RDS技术的烧制过程只需10分钟，而管式炉处理需要几个小时。 RDS处理的另一个优点是，与金刚石石墨化相关的烧结复合材料的XRD光谱中没有任何峰。对于经炉处理的复合材料，观察到这些峰，表明在烧结过程中金刚石有些石墨化。

著录项

  • 来源
  • 会议地点 Florence(IT);Florence(IT)
  • 作者

    Aidan Breen; Greg Byrne; Barry Twomey; Denis Dowling;

  • 作者单位

    School of Electrical, Electronic and Mechanical Engineering, University College Dublin,Bel field, Dublin 4, Ireland;

    School of Electrical, Electronic and Mechanical Engineering, University College Dublin,Bel field, Dublin 4, Ireland;

    rnSchool of Electrical, Electronic and Mechanical Engineering, University College Dublin,Bel field, Dublin 4, Ireland;

    rnSchool of Electrical, Electronic and Mechanical Engineering, University College Dublin,Bel field, Dublin 4, Ireland;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 粉末冶金（金属陶瓷工艺）;
  • 关键词

    Rapid Sintering; Diamond; MMC;

    机译：快速烧结；钻石; MMC;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号