MoSi2発熱体の物理的および機械的性質について

概要

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Corrosion tests of an electric heat element chiefly composed of MoSi 2 in various gases and mechanical tests of that in room and high temperature were studied. Results were summerized as follows : (1) Results of oxidizing test in the air at various temperatures were as follows ; 0.0001 g/cm2 at 1200°C for 1000 hrs, 0.0015 g/cm2 at 1300°C for 360 hrs, 0.0014 g/cm2 at 1400°C for 96 hrs, (2) Results of corrosion test in various gases at 1200°C were as follows ; 0.0004 g/cm2 / day in H2 gas, 0.0003 g/cm2 / day in N2 gas, 0.0005 g/cm2 / day in NH3 gas, 0.0010 g/cm2 / day in CO2 gas, 0.0001 g/cm2 / day in vacuum at 1600°C. (3) Results of mechanical test in room temperature were as follows ; Tensile strength 15.4 kg/mm2 Commpressive strength 12.5 kg/mm2 Modulus of rupture 16.1 kg/mm2 (4) Modulus of rupture in high temperature was decreased as the atmospheric tempera-ture was increased ; for example, when the latter was increased from room tempera-ture to 1250°C, the former decreased from 16.1kg/mm2 to 9.5. (5) Tensile strength at 1600°C was lkg/mm2. (6) Bending creep at 1200°C were as follows ; 1.40 mm at 4 kg/mm2 testing load, 0.42 mm at 1 kg/mm2 testing load
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