Fabrication of Novel Composites. Part II. Fabrication and Properties of Ba-Mica/Al2O3 Composites

摘要

The feasibility of fabricating lamellar ceramic-based composites with controlable and easily modified properties by reactive hot pressing of gamma-Al2O3 with Ba-mica (BaMg3Al2Si2O10F2) has been successfully demonstrated. Cylindrical disks 2 inches in diameter by 1/4-inch thick of Ba-mica/Al2O3 composite material with greater than 99.5% of theoretical density have been produced with the following range of properties: Knoop(100) hardness from 950 to 1970 kg/sq mm, four-point flexure strength from 38,000 to 53,500 psi, and Young's modulus from 28.6 to 60.5 x 1,000,000 psi. (Author)