Micromechanical strength of individual Al2O3 platelets

SCRIPTA MATERIALIA

卷:131

Article

Feilden, Ezra¹  Giovannini, Tommaso^1,2  Ni, Na¹  Ferraro, Claudio¹  Saiz, Eduardo¹  Vandeperre, Luc¹  Giuliani, Finn^1,2 

[1] Imperial Coll London, Ctr Adv Struct Ceram, Dept Mat, London SW7 2AZ, England

[2] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England

关键词: Ceramic;    Flexural strength;    3 point bending;    In-situ;    Sapphire;   

DOI  :  10.1016/j.scriptamat.2017.01.008

来源: Elsevier

【 摘 要 】

Optimising the properties of platelet reinforced composites requires the strength of the reinforcing phase to be known, however strength measurements at such small scales are difficult and therefore data is sparse. In this work the flexural strength and Weibull modulus of microscopic, alumina platelets has been measured as 5.3 +/- 1.3 GPa and 3.7 respectively, using an in-situ micro 3-point bend test. A general approach to correct for the effect of variation in sample size on the Weibull modulus is presented, and the internal structure of the platelets is revealed by TEM. (C )2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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