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用正电子湮没方法研究非晶态合金对认识非晶态的结构模型、电子结构、缺陷分布、结构弛豫、晶化过程起了不可忽视的作用。近年来,在急冷淬火制备非晶态合金带材的基础上又发展了一种崭新的工艺,即液态急冷轧制。因为它降温速率比急冷淬火的慢,且轧制出的带材有较大的厚度,制备的带材呈晶态结构,换句话说,它克服了急冷淬火制备非晶态带材中所存在的热稳定性问题,从而可望短期内在工业生产中得到实际广泛应用,并大大减少生产工序,节约能源和成本。本文报道了用正电子湮没多普勒展宽能谱对液态急冷轧制的Fe-3％Si(工业中所用的一种矽钢的成分)的测量结果,以探索正电子湮没方法在该类合金中的适用性。
Positron annihilation method to study the amorphous alloy amorphous structure model, electronic structure, defect distribution, structure relaxation, crystallization process played a role that can not be ignored. In recent years, the preparation of amorphous alloy quenched and quenched on the basis of the development of a new process, that is, liquid quench rolling. Because it cools down more slowly than quench-quenched, and the rolled strip has a greater thickness, the prepared strip is in a crystalline state, in other words it overcomes the need for quench-hardening of amorphous ribbons Thermal stability problems, which is expected in the short term in industrial production has been widely used in practice, and greatly reduce the production processes, energy conservation and cost savings. This paper reports the measurement results of positron annihilation Doppler broadening spectrum of Fe-3% Si (a composition of a silicon steel used in the industry) of the liquid quenched in order to explore the positron annihilation method in the alloy In the applicability.