Abstract
High density Al 2O 3/W nanocomposite has been successfully fabricated by using controlled reduction and hot-pressing of Al 2O 3/WO 3 mixtures. For realizing desirable microstructures, chemical processing was used to prepare the mixtures by using an inorganic salt as a starting material of W03. TEM investigation revealed that the very fine WO 3 particles surrounded Al 2O 3 particles. During the sintering process under the reductive atmosphere, WO 3 was reduced to metal particles. TEM observation indicated that the nanometer-sized W particles were mainly located within the A1 2O 3 matrix grains. The mechanical properties were improved by dispersing small amount of nanometer-sized metal particles and resultant internal stresses.
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