文摘
For the first time, hot compression of a sintered W-20Cr-20Mo-1.5Pd alloy was performed to improve oxidation resistance. Residual pores in as-sintered alloy were hypothesized to be eliminated through sliding of the viscous Pd-Cr-containing grain boundary during compression at 10鈭? s鈭? and 1350 掳C, which increased the alloy鈥檚 oxidation resistance. Because of sufficient Cr from the Pd-Cr phase near the grain boundary after hot compression, Cr could transfer more efficiently into the Cr-depleted zone, and therefore, the oxide film/matrix interface was much stronger and showed fewer interfacial cracks than the as-sintered alloy did.