Abstract
Post-sintering treatments in hydrogen were applied to free-standing molybdenum shapes fabricated by the oxy-acetylene and arc-plasma flame-spray processes. Hydrogen sintering at 1350°C and 1450°C for periods of 9–48 h yielded substantial improvements in the tensile strength, modulus of elasticity, density and purity of the sprayed deposits. The low impact energy observed in as-sprayed material was retained in the sintered products. Shrinkage was found to be anisotropic and weight loss equivalent to reduction in MoO 2 content. The sprayed molybdenum was converted from a columnar structure to one typical of recrystallized molybdenum sheet.
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