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1、DSC 在新合金材料研究中的重要应用,问题,如果能够随意控制材料的组织,会是什么样的结果?材料热加工工艺的制定依据是什么?例如 铝合金T6处理。,磁性合金,The FeSiBCuNb amorphous alloy with the compositions:Fe73.5Si13.5B9Nb3Cu1 after appropriate annealingexhibits excellent magnetic properties,these superior properties result from crystallization of an initially amorphous mat
2、erial,leading to the formation of nanocrystals(about 10 nm in size)of the Fe3Si phase in the remaining amorphous matrix,This alloy is now available commercially as Finemet.一个非常了不起的发明。Yoshizawa Y,Oguma S,Yamauchi K(1988),The effect of Copper alloying additions on the crystallizationof an amorphous Fe
3、SiB alloyY.R.Zhang,R.V.Ramanujan,The first peak corresponds to the formation of the Fe3Si phase and the second peak indicates the appearance of the Fe3B compound.,It showed that Cu alloying addition made primary crystallization easier suggestingthat it enhances the kinetics of crystallization.For th
4、e FeSiBCu alloy the microstructuralMicrostructural evolution was significantly different:for a heat treatment temperature of 420 C,instead of a dendritic morphology,spheroidal crystals less than 100 nm in size were observed as the first crystallization products,In the FeSiB alloy systems,a dendritic morphology is commonly observed due to solute rejection during crystallization resulting in constitutional supercooling.反差多么强烈!,更复杂的合金,纳米Al合金,焊接钎料,你选择什么工艺制造钎料?,我们自己的工作,C,不同冷速下形成的Fe70Nb10B20在20K/min连续加热条件下的DSC曲线,