A model has been developed for the calculation of the microstructural evolution in a rapidly directionally solidified immiscible alloy. Numerical solutions have
<正>Nb-15W-18Si-xHf(x = 0, 5,10 and 15, mole fraction, %) alloys were prepared by arc melting and then homogenized at 1 750℃for 50 h. The microstructure and me
Compared with a conventional Hall-Heroult cell(H-H cell), the interpolar distance of a drained cell can be reduced significantly and the cell voltage and heat p