CHEMICAL AND PHYSIOCHEMICAL METHODS of metal powder production allow great variations in powder properties. The wide variety of processing variables and production parameters currently available permit close control of particle size and shape. Powders made by reduction of oxides, precipitation from solution or from a gas, thermal decomposition, chemical embrittlement, hydride decomposition, and thermit reactions belong in this classification. The most widely used processes within this category include oxide reduction, precipitation from solution, and thermal decomposition.

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