J Mater Sci Technol ›› 1994, Vol. 10 ›› Issue (3): 170-174.
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Shiming HAO+ and Wen tao WU(Dept. of Mater. Sci., Northeastern University, Shenyang, 110006, China)Chuanxi HAN(Northwest Institute for Nonferrous Metal Research, Bao ji, 721014, China)