【摘要】 控制退火处理工艺使Fe73.5Cu1Nb3Si13.5B9非晶合金发生纳米晶化,获得不同晶粒尺度和晶相体积分数的非晶纳米晶双相组织状态.基于铁磁学严格Heisenberg自旋交换模型,构造适合非晶纳米晶双相结构要求的双相自旋团聚点阵.采用MonteCarlo模拟方法对上述双相自旋交换耦合点阵进行数值模拟计算.实验测定了经不同退火处理后双相Fe73.5Cu1Nb3Si13.5B9合金的纳米晶粒大小、纳米晶相所占体积分数以及晶间非晶相厚度对晶间非晶相Curie温度的影响.发现晶间非晶相Curie温度与其厚度的倒数成线性关系.模拟计算与实验测量结果相符.更多还原

【Abstract】 The enhancement of Curie temperature of the intergranular amorphous phase in duplex-phase alloy Fe73.5Cu1Nb3Si13.5B9 was investigated by both experiment and Monte Carlo com puter simulation on the base of isotropic Heisenberg model. It was observed that large crystallinzed volume fraction VC,a, small grain size d and thin inter-phase thickness ξ lead to the enhancement in Curie temperature TC,a, which may be formulated simply as below: TC,a-1/ξ. The simulation result is in a good accordance with its experimental counterpart.更多还原