Neutron diffraction study of the phase-specific stresses in graded alumina/zirconia ceramics

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• 作者：Luká ; &scaron ; Petr ; Vrá ; na ; Miroslav ; Mikula ; Pavel ; Vleugels ; J. ; Anné ; G. ; et. al.
• 关键词：81.05.Je ; 61.12.Ld ; 62.20.Mk ; Functionally graded materials ; Ceramics ; Residual stress ; Neutron diffraction
• 刊名：Physica B
• 出版年：2004
• 出版时间：July 15, 2004
• 年：2004
• 卷：350
• 期：1-3, Supplement
• 页码：E517-E520
• 全文大小：277 K

文摘

New functionally graded Al₂O₃/Y-ZrO₂ ceramics are developed as a new material for production of hip prosthesis, especially all-ceramic hip bearings. The used concept of graded ceramics is expected to provide better long-term performance based on improved mechanical properties and lower clinical risks. Mechanical properties are strongly dependent on distribution of residual stresses resulting mainly from phase specific stresses after cooling from sintering temperature. However, these stresses could be optimized by an appropriate selection of a concentration profile of constituent phases. The non-destructive neutron diffraction mapping of residual stresses has been used to investigate this problem experimentally.