A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials

• R. L. Coble

  Ceramics Division, Department of Metallurgy, Massachusetts Institute of Technology, Cambridge 39, Massachusetts

抄録

The creep rate (ė) predicted by the boundary diffusion (Db) model is ė≃150σDbWΩ/(GS)3kT, where σ is the stress, W is the boundary width, (GS) is the average grain size, and Ω is vacancy volume. The stress dependence is the same as the lattice diffusion model, given by C. Herring, while the grain size dependence and the numerical constant are greater for boundary diffusion. Discussion of the mechanism of creep in polycrystalline alumina is based on the differences between the lattice and boundary diffusion models.

収録刊行物

• Journal of Applied Physics

  Journal of Applied Physics 34 (6), 1679-1682, 1963-06-01

  AIP Publishing

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1360011146094727808
• NII論文ID: 30015907462
• NII書誌ID: AA00693547
• DOI: 10.1063/1.1702656
• ISSN: 10897550
• ISSN: 00218979
• ISSN: http://id.crossref.org/issn/00218979
• Web Site: https://pubs.aip.org/aip/jap/article-pdf/34/6/1679/18329187/1679_1_online.pdf
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