モリブデンと炭素および炭化物との反応

• 諸住 正太郎

  東北大学金属材料研究所

• 菊地 迪夫

  東北大学金属材料研究所

• 菅井 普三

  東北大学大学院，現在：東京芝浦電気株式会社

• 林 正明

  東北大学工学部，現在：千代田保安用品株式会社

書誌事項

タイトル別名

• Reaction Between Molybdenum and Carbon, and Several Carbides
• モリブデン ト タンソ オヨビ タンカブツ ト ノ ハンノウ

抄録

Diffusion couples of molybdenum with carbon and several carbides, i.e. B₄C, SiC, TiC, and TaC, respectively, were heated for up to 3.6×10⁵ s at various temperatures ranging from 1373 to 2223 K. The couples were then examined for composition, growth rate, structure, and hardness of reaction layers. Main results obtained are as follows:<BR>(1) In the Mo-C system, only Mo₂C layer was formed at below 1873 K, while two sub-layers consisted of Mo₂C and η (MoC_1−x), respectively, were found at above 1873 K. The activation energy for growth of total layer was 374 kJ/mol.<BR>(2) In the Mo-B₄C system, two sub-layers consisted of Mo₂B and MoB, respectively, with dispersed carbon particles were formed.<BR>(3) In the Mo-SiC system, Mo₂C layer, including η (MoC_1−x) phase at high temperature, mixture of Mo₂C and Mo₃Si₂ phases, and Mo₃Si₂ phase in order from the Mo side were formed. The activation energy for growth of total layer was 477 kJ/mol.<BR>(4) In the Mo-TiC system, two kinds of TiC in point of view of free carbon content were used; one is with 0.2% free carbon and the other is with 0.01%. In the Mo-TiC with 0.2% free carbon system, two sub-layers, i.e. relatively thick Mo₂C layer and thin (Ti, Mo)C layer, were formed, while in the Mo-TiC with 0.01% free carbon system two thin sub-layers, Mo₂C and (Ti, Mo)C, were formed; the Mo₂C layer in the latter case was very thin and was not found after short time heating at low temperature. The activation energy for growth of Mo₂C layer in the former system was 393 kJ/mol.<BR>(5) In the Mo-TaC with 0.02% free carbon system, two thin sub-layers, (Mo, Ta)₂C and (Ta, Mo)C, were observed.<BR>(6) TEM studies on the interface between Mo(bcc) and Mo₂C(hcp) showed that there was the following orientation relation, called as the Burgers relation, between these two phases; {110}_Mo\varparallel(0001)_Mo<SUB>2C</SUB>, ⟨111⟩_Mo\varparallel⟨11\bar20⟩_Mo<SUB>2C</SUB>.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 44 (12), 1404-1413, 1980

  公益社団法人 日本金属学会

キーワード

• Materials Chemistry
• Metals and Alloys
• Mechanics of Materials
• Condensed Matter Physics

詳細情報

• CRID: 1390001206485586304
• NII論文ID: 130007339277
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.44.12_1404
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 2200549
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2200549
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/44/12/44_12_1404/_pdf
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