摘要
通过铝热反应熔化方法分别在不同的引燃剂量,混料时间及成型压力下制备了块体纳米晶Fe3Al材料,通过XRD研究了材料的晶粒尺寸,并研究了材料的室温压缩性能和硬度。结果表明:随着引燃剂量的增加,晶粒尺寸先略降低后增加,屈服强度随之先略增加后减小,硬度逐渐减小;混料时间对材料的平均晶粒尺寸和力学性能的影响作用不大;随着成型压力的增加,材料的平均晶粒尺寸基本稳定,材料的屈服强度和硬度有所提高。
Bulk nanocrystalline Fe3Al materials were prepared by aluminothermic reaction at different igniter quantities,milling time,and molding pressure.The grain size was studied by means of XRD.Compressive strength and hardness of the materials were tested.The results showed that with igniter quantity increasing,the average grain size of materials reduced slightly,and then increased,while the yield strength increased slightly and then decreased;the hardness gradually decreased.The effect of milling time on nanostructure and mechanical properties of the bulk nanocrystalline Fe3Al materials is not remarkable.With the powder pressing increasing,the average grain size of materials is stable,yield strength and hardness of materials increased.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2010年第7期18-23,共6页
Journal of Materials Engineering
基金
国家自然科学基金(50674051)
关键词
引燃剂量
混料时间
成型压力
晶粒尺寸
力学性能
铝热反应
igniter quantity
milling time
powder pressing
grain size
mechanical property
aluminothermic reaction
