抄録
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
