Mechanical properties and microstructure of Al2O3/mullite composite
- 346 Downloads
An Al2O3/5 vol.% mullite composite was synthesized by using reaction sintering of Al2O3/0.78 wt.% SiC at 1,600 °C for 2 h in air. The phase analysis of the Al2O3/mullite composite was carried out using X-ray diffraction (XRD). There were two kinds of mullite in alumina/mullite composite, namely, 3Al2O3·2SiO2 and Al5.65Si0.35O9.175. The microstructure of the Al2O3/mullite composite was investigated using scanning electron microscope (SEM) and transmission electron microscope (TEM). The mechanical properties such as Young’s modulus, Poisson’s ratio, hardness, toughness and strength of the Al2O3/mullite composite were investigated. The influence of mullite on the composite is discussed.
KeywordsFracture Toughness Flexural Strength Reaction Sinter Al2O3 Powder Quantitative Phase Analysis
The authors wish to thank Dr. Richard Todd for his helpful discussions, and his invaluable expertise in this field was greatly appreciated. The work is supported by Personnel Department of Hebei Province.
- 9.Wang J, Ponton CB, Marquis PM (1995) J Mater Sci 30:321, DOI: 10:1007/BF00354391Google Scholar
- 11.Anya CC (1999) J Mater Sci 34:5557, DOI: 10:1023/A: 1004729015686Google Scholar
- 12.Katsuki H, Ichinose H, Shiraishi A, Takaqi H, Hirata Y (1993) J Ceram Soc Jpn 9:1041Google Scholar
- 13.Tamari N, Kondoh I, Tanaka T, Katsuki H (1993) J Ceram Soc Jpn 6:704Google Scholar