ChemInform Abstract: Tensile Creep of Alumina-Silicon Carbide “Nanocomposites”.

✍ Scribed by A. M. THOMPSON; H. M. CHAN; M. P. HARMER

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 25 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199752004

✦ Synopsis

1997 mechanical properties, thermal properties mechanical properties, thermal properties D 3000

52 -004

Tensile Creep of Alumina-Silicon Carbide "Nanocomposites".

-The tensile creep resistance of Al2O3 is improved dramatically by addition of submicrometer SiC particles. Addition of 5 vol.% of 0.15 . mu.m SiC particles reduces the tensile creep rate of fully dense Al2O3 by 2-3 orders of magnitude. At a tensile stress of 100 MPa the creep mechanism does not change within the temperature range 1200-1300 . degree.C and the apparent activation energy for tensile creep is . apprxeq.840 kJ/mol. The 5-vol.%-SiC nanocomposite displays a well-developed tertiary creep stage. Studies of the microstructure show extensive cavitation associated with the occurrence of SiC particles at the Al2O3 grain boundaries. -(THOMPSON, A.