Al2O3-Ni Composites with High Strength and Fracture Toughness

Author

William Fahrenholtz, Missouri University of Science and TechnologyFollow
Donald T. Ellerby
Ronald E. Loehman

Abstract

Al₂O₃-Ni Composites Were Prepared by the Reactive Hot Pressing of Al and NiO. the Composites Had a Two-Phase, Interpenetrating Microstructure and Contained Approx. 35 Vol% Ni. They Exhibited an Impressively High Combination of Strength and Toughness at Room Temperature; the Four-Point Bending Strength Was in Excess of 600 MPa with a Fracture Toughness of More Than 12 MPa·m^1/2 . Examination of Fracture Surfaces Showed that Ni Ligaments Underwent Ductile Deformation during Fracture. SEM Analysis Revealed Knife-Edge Ni Ligaments with a Limited Amount of Debonding Around their Periphery (I.e., at the Ni-Al₂O₃ Interface), Indicating a Strong Ni-Al₂O₃ Bond.

Recommended Citation

W. Fahrenholtz et al., "Al2O3-Ni Composites with High Strength and Fracture Toughness," Journal of the American Ceramic Society, vol. 83, no. 5, pp. 1279 - 1280, Wiley, Jan 2000.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.2000.tb01368.x

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0002-7820

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Wiley, All rights reserved.

Publication Date

01 Jan 2000