Chakraborty, R and Mukhopadhyay, Anoop Kumar and Dey, A and Joshi, Keshaw D and Rav, A and Biswas, Sampad Kumar and Gupta , S C (2010) Nanomechanical properties of coarse grain alumina ceramic. Journal of the Institution of Engineers (India), Part MM: Metallurgy and Material Science Division, 91 (Oct). pp. 9-14. ISSN 0257-4411

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The hardness of alumina ceramics determines their performance in high end structural applications like wear resistant inserts, coatings, cutting tools, biomedical load bearing implants and armor face plate etc. Therefore, the nano-hardness (H) and Young’s modulus (E) of a pressureless sintered, 99.99% dense, 10 μm grain size alumina were measured by nanoindentation at 10 mN to 1000 mN load with a Berkovich indenter. The decrease in nano-hardness with the increase in indentation depth revealed the presence of an indentation size effect (ISE) which was explained by the application of the well established Nix and Gao model. The measured value of Young’s modulus (400 GPa) was insensitive to variation in loads applied during the nanoindentation experiments.

Item Type: Article
Uncontrolled Keywords: Nanoindentation; Hardness; Alumina; Ceramics; Indentation size effect
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 26 Mar 2012 09:42
Last Modified: 28 Mar 2012 10:27

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