放電プラズマ焼結法によって作製した遷移金属炭化物分散Mo焼結合金の低温破断挙動 Low-Temperature Fracture Behavior of Sintered Molybdenum Alloys Dispersed with Transition Metal Carbides prepared by Spark Plasma Sintering

この論文にアクセスする

この論文をさがす

著者

抄録

In order to improve both fracture strength and ductility at low temperature, fine-grained sintered molybdenum alloys dispersed with 0.8mol% TaC or 1.6mol% TiC were prepared by mechanical alloying (MA) and spark plasma sintering (SPS). The mixtures of fine molybdenum powder with grains measuring 20nm in diameter and carbide particles which were prepared by MA, were sintered at 1870K for 300s under 49MPa by SPS. The sintered alloys had relative densities of over 99% and grain sizes of approximately 2-5μm. The low-temperature fracture strength and ductility were evaluated by a three-point bending test at 77K to 360K. The results were compared with those for sintered alloys dispersed with 0.4-1.6mol% TaC or TiC which were prepared by MA and hot isostatic pressing (HIP). The following results were obtained.<BR>(1) Both low-temperature fracture strength and ductility increased by dispersion of carbides. This result was the same as those obtained from sintered alloys prepared by MA and HIP.<BR>(2) The alloy dispersed with TaC had a low dutile-to-brittle transiton temperature of 157K and a high fracture strength of 1860MPa at the temperature.<BR>(3) High fracture strength of the present alloy was attributed to both carbide dispersion and grain refining, though the former effect was much effective.<BR>(4) The alloy dispersed with TaC exhibited mostly intergranular fracture mode. The intergranular fracture area comprised 70% of the total fracture area. In contrast, the alloy dispersed with TiC exhibited a mixed mode of intergranular and transgranular fracture. The intergranular fracture area comprised 50%.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(11), 1098-1104, 1998-11-15 

    Japan Society of Powder and Powder Metallurgy

参考文献:  23件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  4件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10002053299
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4608386
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ