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Mechanical Properties of Dry-Pressed Powder Compacts: Case Study on Alumina Nanoparticles

Kounga Njiwa, Alain Brice and Aulbach, Emil and Rödel, Jürgen and Neubrand, Achim (2006):
Mechanical Properties of Dry-Pressed Powder Compacts: Case Study on Alumina Nanoparticles.
89, In: Journal of the American Ceramic Society, (8), pp. 2641-2644, ISSN 0002-7820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2006.01088.x],
[Article]

Abstract

Young's modulus and fracture toughness of dry-pressed powder compacts of nanocrystalline alumina powders have been determined for different relative densities and average grain size. The powder with a grain size of 40 nm yielded a maximum Young's modulus of 15 GPa and a peak fracture toughness of 0.12 MPa·m1/2. These high values are rationalized using a model based on contact flattening between particle spheres, which allows a discussion of the influence of grain size and particle packing on the mechanical properties of green bodies.

Item Type: Article
Erschienen: 2006
Creators: Kounga Njiwa, Alain Brice and Aulbach, Emil and Rödel, Jürgen and Neubrand, Achim
Title: Mechanical Properties of Dry-Pressed Powder Compacts: Case Study on Alumina Nanoparticles
Language: English
Abstract:

Young's modulus and fracture toughness of dry-pressed powder compacts of nanocrystalline alumina powders have been determined for different relative densities and average grain size. The powder with a grain size of 40 nm yielded a maximum Young's modulus of 15 GPa and a peak fracture toughness of 0.12 MPa·m1/2. These high values are rationalized using a model based on contact flattening between particle spheres, which allows a discussion of the influence of grain size and particle packing on the mechanical properties of green bodies.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 89
Number: 8
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2006.01088.x
Identification Number: doi:10.1111/j.1551-2916.2006.01088.x
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