Duplex ceramics: II. Strength and toughness

✍ Scribed by H.E. Lutz; N. Claussen

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 833 KB
• Volume: 7
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/0955-2219(91)90023-s

✦ Synopsis

Strength and toughness of various sintered and HiPed duplex ceramics are investigated. It is found that the strength is reduced and the toughness increased compared with the respective matrix data. The tran~[ormability of the Zr0 2 particles in the incorporated zones is examined. The retained strength of duplex ceramics after a mechanically introduced sulT[ace damage, i.e. their mechanical damage resistance, is improved when compared to the pure matrix. An attempt is made to relate normalized strength, normalized toughness, and mechanical damage resistance of duplex ceramics to an internal stress intensity . ['actor, K~, generated around the pressure zone. naturel ou par pressage isostatique gt chaud. On montre que, par rapport aux valeurs obtenues pour la matrice, la r~sistance m&'anique est plus faible et la tOnacitO plus NevOe. La transjbrmabilitO des par ticules de ZrO 2 dans les zones incorporOes a ktO examinee. La rOsistance des c{ramiques duplex apr~s introduction mOcanique de dOfauts de surface, c'est h dire leur r~sistance gt l'endommagement mOcanique, est accrue