By Edited by Hongxi Zhu Linjiang Wang

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Pearsom. 173(1953), P. 217 [13] R. Schuhmann, P. J. Ensio. Met. Soc. 191(1951), P. 401 [14] Kai Tang, Guochang Jiang, Guozhi Zhou, Weizhong Ding, Fushen Li, Kuangdi Xu. 36(2000), P. 502(In Chinese). [15] Jian Zhang. Journal of Iron and Steel Research International Vol. 10(2003), P. 1 [16] Jian Zhang. Rare metals Vol. 22(2003), P. 25 [17] Jian Zhang. Rare Metals Vol. 21(2002), P. 43 [18] Jian Zhang. 12(2005), P. 213 [19] Jian Zhang. Rare Metals Vol. 23(2004), P. 209 [20] G. Eriksson, A. D. Pelton.

Turn the equation set into this: f(x)=0 Here x is multivariate variable: x = [ x1 , x2 , , x8 ] = [ N1 , N 2 , N 3 , N 4 , N 5 , N 6 , N 7 , N8 ] T T , f is a column vector which is made up of multi-functions: f ( x ) = [ f1 ( x ), , f8 ( x ) ] T In the equation f1(x) is Eq. 13,f2(x)~f8(x) are the remaining few simplified f(x)=0 equations respectively. Let x ( k ) = ( A( k ) , , H ( k ) ) is the approximate solution of equation set K step, the iterative formula is: x (k+1)= x (k)−(M (k))−1 f (x(k) ) M(k) is an 8-order matrix, the concrete calculation procedure as follows.

ZENG: Mechanism of coblat removal from zinc sulphate solution, PhD thesis, Kunming university of science and technology, Kunming, China (2006). cn Key words: Oxidation kinetics; Magnesium; Copper Alloy; Aluminum Alloy; Model Abstract. The oxidation kinetics of copper or aluminum added with magnesium was investigated by a modified Chou model. The effect of the addition of magnesium in copper or aluminum was discussed. 34 was the highest among Cu-Mg alloys at 600-900 °C, which indicated that it had the best oxidation resistance in all of the samples.

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