常圧焼結窒化ケイ素の引張試験と強度に及ぼす空孔等製造欠陥の影響

• 岸本 秀弘

  豊田工業大学

• 上野 明

  豊田工業大学

• 河本 洋

  トヨタ自動車(株)

• 浦 幸雄

  住友金属鉱山(株)

書誌事項

タイトル別名

• Tensile test of sintered Si3N4 and the influence of process defects such as pores on fracture strength.
• ジョウアツ ショウケツ チッカ ケイソ ノ ヒッパリ シケン ト キョウド ニ

抄録

Tensile tests were carried out on sintered Si₃N₄ at room temperature under the ambient condition, and the influence of defects upon the fracture stress was discussed. As the surface of specimens was prepared carefully, fracture of 57 specimens out of 60 originated from the defects such as voids or inclusions which resulted from the sintering process. As a parameter to describe the size of the defect, √area was used which is the square root of the area of a 3-dimensional defect projected to the direction of the maximum principal stress. The results obtained are as follows.<br>(1) √area of defects which caused fracture nearly conforms to the first asymptotic distribution of the largest value and the fracture strength conforms to Weibull distribution.<br>(2) √area is a good parameter to describe the size of the defect from the standpoint of fracture.<br>(3) Defects such as voids and inclusions act exactly as cracks of the same size.<br>(4) The fracture strength can be estimated by using the distribution of √area, the fracture toughness and the mean grain size of Si₃N₄.

収録刊行物

• 材料

  材料 38 (424), 32-38, 1989

  公益社団法人 日本材料学会

キーワード

• Sintered silicon nitride
• Tensile test
• First asymptotic distribution of the largest value
• √<i>area</i>
• Influence of process defect
• Pores and inclusions

詳細情報

• CRID: 1390282680395194624
• NII論文ID: 110002297283
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.38.32
• COI: 1:CAS:528:DyaL1MXhslyiu7k%3D
• ISSN: 18807488
• ISSN: 05145163
• NDL書誌ID: 3221229
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3221229
• 本文言語コード: ja
• 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