Abstract
Previously, our study on the sintering process of refractory hard metallic compound NiAl has been reported on. Now, in order to determine the physical and mechanical properties of sintered NiAl, oxidation resistance, axial rupture by compression, transverse rupture by bending and absorption energy by Charpy test were examined. The following experimental results were obtained: The oxidation resistance of sintered NiAl was stronger than N-155, 25-20 and sintered CoAl, and NiAl cold-pressed at 5 t/cm2, sintered at 1400° for 5 hr, was fractured by Compression of about 15 ton/cm2. The value of absorption energy was generally increased when the testing temperatures rose over 600°.
