Low Frequency Internal Friction Study of Sintered Ultra-Fine Aluminium Products

抄録

The internal friction of sintered ultra-fine aluminium products (SUFAP) has been measured in an inverted torsion pendulum apparatus. A relaxation peak of a thermal activation type is observed at about 400 K. A possible mechanism for the peak is suggested; grain boundary sliding of fine grains of aluminium with some contribution of the diffusional relaxation along oxide or nitride particles. The results are compared with a mechanical property of SUFAP measured in a previous study.