| http://www.w3.org/ns/prov#value | - The grain refiner in one exemplary method being any chromium carbide (e.g., Cr3C2, Cr23C6 and Cr7C3 or mixtures of these) or a mixture of chromium and carbon or other compounds containing chromium and carbon and/or nitrogen; sintering the compact and grain refiner powder so as to diffuse the grain refiner away from the surface(s) on which the grain refiner was placed to form a gradient zone in a s
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