...
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Metal foam stabilization by oxide network particles
【24h】

Metal foam stabilization by oxide network particles

机译:通过氧化物网络颗粒稳定金属泡沫

获取原文
获取原文并翻译 | 示例
           

摘要

The fundamental stabilization mechanism for foaming metal powder compacts (PM foams) is investigated. It is shown that PM foams belong to the class of stable foams where the stability is controlled by the balance of interfacial forces which equilibrate after drainage has been completed. The origin of these interfacial forces is traced back to the oxide content of the underlying metal powder. The oxides are not present as compact particles but form crumpled, voluminous aggregates, the oxide network particles, which form a tenuous global network. The effective volume fraction of these network particles is about 30-35 percent. Analogous to a gel-sol transition, bubble nucleation leads to a fragmentation of the global oxide network structure. The isolated oxide network fragments have particle character and act as mechanical barriers within the foam structure where they induce a strong stabilizing disjoining pressure.
机译:研究了发泡金属粉末压块(PM泡沫)的基本稳定机制。结果表明,PM泡沫属于稳定泡沫的一类,其稳定性受排水完成后平衡的界面力平衡的控制。这些界面力的起源可追溯到下层金属粉末的氧化物含量。氧化物不以致密颗粒的形式存在,而是形成皱褶的,大量的聚集体,即氧化物网络颗粒,它们形成了一个脆弱的全局网络。这些网络粒子的有效体积分数约为30-35%。类似于凝胶-溶胶转变,气泡成核导致整体氧化物网络结构的破碎。隔离的氧化物网络碎片具有颗粒特性,并充当泡沫结构内的机械屏障,在这些结构中,它们会诱导强烈的稳定解体压力。

著录项

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