Preparation and mechanical properties of SiC whisker and nanosized mullite particulate reinforced TZP composites

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb09050.x· OSTI ID:413329

Zhang, Z; Huang, Y; Zheng, L; Jiang, Z ^[1]

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1. Tsinghua Univ., Beijing (China). Dept. of Materials Science and Engineering

The influence of the addition of nanometer mullite particulates and SiC whiskers coated with alumina on the mechanical properties of tetragonal zirconia polycrystals (TZP) was studied. With increasing mullite (p) content the high-temperature flexural strength increased, and a maximum value of 360 MPa at 1,000 C was reached at 15 vol% mullite (p). Furthermore, 10 vol% SiC(w) reinforced 15 vol% mullite/TZP composites improved the high-temperature strength up to 490 MPa at 1,000 C, 2.7 times that of pure TZP matrix. This high-temperature strengthening is attributed to load transfer from TZP matrix to SiC(w) and mullite particulates. Significant whisker pull-out and interface debonding were also observed on the fractured surfaces when Sic(w) was coated with Al{sub 2}O{sub 3} film.

• Sponsoring Organization: USDOE
• OSTI ID: 413329
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BULK DENSITY
CALCINATION
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
FLEXURAL STRENGTH
FRACTURE PROPERTIES
HOT PRESSING
MECHANICAL PROPERTIES
MULLITE
POWDERS
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
SOLID SOLUTIONS
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES