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Power, torque, and rotation speed of the impeller of an attritor mill were measured during preparation of metal matrix composite powders. Compositions of Al·MgO and Al·B4C were selected to include ductile (Al) and brittle components. Brittle components, MgO, and B4C, were respectively softer and harder than the milling media (hardened steel). Yield strength of pressed powder compacts and x‐ray diffraction...
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