Proposal of Atomic Models for Formation Process of Carbonitride W(C,N) Synthesized by Normal- and High-pressure Methods

• Tanaka Kazuhiko

  Institute of Industrial Science, The University of Tokyo

• Asada Nobuaki

  Allied Material Corp. Ltd.

• Hayashi Koji

  Institute of Industrial Science, The University of Tokyo

抄録

The syntheses of new mono-carbonitrides of W and/or Mo, i.e., W(C, N), Mo(C, N) and (W, Mo)(C, N), which are thermodynamically unable to be generated by using nitrogen gas of normal pressure, have been succeeded by the authors by using CH₄+NH₃ mixed gas of normal pressure (normal-pressure method) and C powder+nitrogen gas of high pressure (high-pressure method). The formations of these mono-carbonitrides as well as of general compounds by those methods have been explained by applying traditional Ostwald's step rule and virtual-pressure concept for normal-pressure method, and Le Chatelier's principle for high-pressure method, respectively. These explanations, however, are based only on the macroscopic level, but not on the atomic level.<BR>In this paper, we newly proposed atomic models for the formation process of W(C, N) in both normal- and high-pressure methods, mainly based on the previous experimental results. The models include the concepts of "nascent atoms" and "nitrogen molecular cluster in supercritical fluid", etc., respectively.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 50 (7), 534-544, 2003

  一般社団法人 粉体粉末冶金協会

キーワード

• nascent atom
• supercritical fluid
• molecular cluster
• ammonia
• methane

詳細情報

• CRID: 1390001206307448704
• NII論文ID: 10011242418
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.50.534
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 6654475
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6654475
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可