非晶Fe_(78)Si_9B_(13)合金磁致低温纳米晶化的超精细结构研究  

Study on hyperfine-structure of amorphous Fe_(78)Si_9B_(13) alloy by low frequency pulse magnetic field

作　　者：周迎春[1] 张启俭[1] 晁月盛[2] 

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001 [2]东北大学理学院,辽宁沈阳110004

出　　处：《功能材料》2010年第10期1694-1698,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50771025);高等学校博士学科点专项科研基金资助项目(20020145009)

摘　　要：用低频脉冲磁场处理了非晶Fe78Si9B13合金,以红外非接触测温仪测量处理过程的温升,用Mssbauer谱、XRD和TEM等手段观察样品的超精细结构变化。结果表明,脉冲磁场处理过程中,非晶Fe78Si9B13合金发生了低温纳米晶化,试样温升均<7℃,晶化析出相仅为α-Fe(Si),晶粒尺寸约为10nm,析出量为2.428%～6.992%,所形成的非晶-纳米晶双相合金的平均超精细磁场较原始非晶发生了明显变化,其单峰向低位场移动,在高位场又有出现另一单峰的迹象,脉冲处理参数不同,各峰出现的位置不同。The amorphous Fe78Si9B13alloy was treated by low frequency pulse magnetic field（LFPMF）.The temperature rise of specimens during the magneto-pulsing treatment was measured by a infrared non-touch-thermometer,the microstructural change of amorphous specimens after treatment were observed by Mssbauer spectroscopy,XRD,TEM,etc.The results showed that nanocrystallization of amorphous specimens can occur at low temperature.The temperature rise is under 7℃.The volume content and grain size of nanocrystalline phase α-Fe（Si）are about 2.428%-6.992% and 10nm,respectively.Compared with the as-quenched sample,the double-phase nanocrystalline alloy has obvious high mean hyperfine magnetic field.After the LFPMF treatment,this single-peak shifted to lower magnetic field and there was a sign of appearance of another single-peak at higher magnetic field.The peaks position varied with the pulse magnetic field parameters.

关 键 词：低频脉冲磁场 非晶Fe78Si9B13合金 纳米晶化 超精细结构 

分 类 号：TB383[一般工业技术—材料科学与工程]