摘要
利用机械合金化和放电等离子烧结技术制备了Fe73.5Cu1Nb3Si13.5B9非晶纳米晶合金块体磁性材料。采用XRD、SEM和DSC分析了Fe73.5Cu1Nb3Si13.5B9合金粉体的相组成、微观形貌和热物性参数;利用Gleeble3500、SEM和VSM分析了烧结温度、升温速率、烧结压力、保温时间和冷却方式等烧结工艺参数对烧结块体抗压强度、压缩断口形貌和磁性的影响。结果表明,烧结温度的升高、烧结压力的增大和冷却速率的增加有利于提高烧结块体的抗压强度;升温速率的增加和保温时间的延长使烧结块体的抗压强度先增高后降低;同时,烧结温度的升高和保温时间的延长使烧结块体的饱和磁化强度增大,矫顽力先降低后增加。
Bulk Fe73.5Cu1Nb3Si13.5B9 amorphous nanocrystalline alloys embedded by nanocrystalline are prepared by mechanical alloyingand spark plasma sintering. The dependence of the compressive strength and magnetic properties on sintering parameters isdiscussed. The phase composition, micro morphology and thermophysical properties of the alloy powders are analyzed. The compressivestrength, compression fracture morphology and magnetic properties of sintered samples are measured. The results showthat the compressive strength of the sintered samples increases initially and subsequently decreases with heating rate and holdingtime, suggesting that increasing sintering temperature, sintering pressure and cooling rate could be favorable for enhancing thecompressive strength. The saturationmagnetization and the coercivity showdifferent behaviors with sintering temperature and holdingtime.
出处
《燕山大学学报》
CAS
2014年第6期491-496,502,共7页
Journal of Yanshan University
基金
河北省应用基础研究计划重点基础研究项目(13961001D)
国家科技支撑计划项目(2013BEA08B01)
关键词
Fe基非晶纳米晶合金
机械合金化
放电等离子烧结
饱和磁化强度
矫顽力
Fe-based amorphous nanocrystalline alloy
mechanical alloying
spark plasma sintering
saturation induction density
coercivity
