Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》
Abstract： Oxidation behavior of two ferrite/martensite(F/M) steels, namely a novel 9%-12% Cr modified F/M steel (SIMP steel) and a commercial T91 steel were comparatively studied in air at 800oC. The oxide scales formed on the two steels were characterized by XRD, SEM and EPMA. The results show that the oxide scale formed on SIMP steel is single-layer composed of Cr2O3 and Mn1.5Cr1.5O4 spinel particles, and Si was enriched at the interface between the chromia scale and matrix; while the oxide scale formed on T91 steel has a double layered structure with an outer hematite Fe2O3 layer and an inner Fe-Cr spinel layer. The SIMP steel has better high temperature oxidation resistance than T91 steel, which may be due to the higher content of Cr and Si beneficial to the formation of the compact oxide scale on the SIMP steel.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-15 Cooperative journals: 《金属学报》
Abstract：加速器驱动次临界ADS（Accelerator Driven Subcritical system）系统由加速器、散裂靶、反应堆三部分组成，被认为是安全处理核废料最具前景的技术方案。其中，散裂靶用结构材料需要同时具有耐高温、抗辐照、抗液态金属腐蚀等性能。针对这一挑战研发了新型核用马氏体耐热钢－SIMP钢。通过制衡9-12Cr%马氏体耐热钢中C、Cr、Si等重要元素含量对耐高温、抗辐照、抗液态金属腐蚀性能的影响，获得了SIMP钢优化的化学成分，极好地平衡了SIMP钢耐高温、抗辐照、抗液态金属腐蚀三方面性能。以1吨级和5吨级SIMP钢为实验材料的各项性能测试结果表明，SIMP钢是ADS系统中散裂靶的首选结构材料。
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