J Mater Sci Technol ›› 1994, Vol. 10 ›› Issue (2): 139-142.
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Jingtang WANG; Bingzhe DING; Huayu TONG and Qihong SONG (State Key Lab of RSA, Institute of Metal Research, Academia Sinica, Shenyang, 110015, China)(To whom correspondence should be addressed)