Interstitial chemistry in sintering of metallic materials – often overlooked but decisive

R. de Oro Calderon, C. Gierl-Mayer, H. Danninger
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引用次数: 1

Abstract

Abstract Sintering is a process by which particulate materials – loose or compacted – are transformed into a body that may be fully dense or may still contain pores, but in any case has structural integrity and load-bearing capacity. The physical mechanisms – especially the transport processes – that are responsible for these changes have been studied since the 1950s. However, the chemical part of sintering also is of decisive importance in particular for metallic systems, especially concerning the interstitial elements O and C. Any metal powder that has ever been exposed to air bears oxygen on the surface, and this oxygen has to be removed in the early stages of sintering to enable the physical transport processes to become effective. In the present work, various chemical reactions involving oxygen and/or carbon are described, and it is shown how the alloying system selected as well as the starting powder grade affect these reactions and the properties of the final products.
金属材料烧结中的间隙化学——常常被忽视,但却是决定性的
烧结是一个过程,通过该过程,颗粒材料-松散或压实-转变成一个体,可能是完全致密或可能仍含有孔隙,但在任何情况下具有结构完整性和承载能力。自20世纪50年代以来,人们一直在研究导致这些变化的物理机制,特别是运输过程。然而,烧结的化学部分也具有决定性的重要性,特别是对于金属系统,特别是关于间隙元素O和c。任何金属粉末都暴露在空气中,表面上带有氧气,在烧结的早期阶段必须除去氧气,使物理运输过程变得有效。在本工作中,描述了涉及氧和/或碳的各种化学反应,并说明了所选择的合金体系以及起始粉末等级如何影响这些反应和最终产品的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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