Ni3Al的正电子湮没测量

Positron annihilation measurement of Ni_3Al

Positron-lifetime and Doppler-broadening measurements were performed at room temperature on polycrystalline Ni3Al alloys. The content of aluminum in Ni3Al is 24%, 25% and 26% respectively. Fifteen Ni3Al samples, containing 0, 100, 300, 500 and l000wt. ppm boron respectively, were measured. The positron measurement is carried out for the first time for six samples among them. The results are discrepant with Dasgupta's results in some aspects and the possible reason was discussed.