摘要
借助XRD、DTA等分析手段,研究了快淬Fe78Si9B13非晶带的热稳定性,分析了高压烧结条件对球磨非晶粉末烧结获得的块体合金相对密度和晶粒尺寸的影响。结果表明:该非晶合金中,αFe相初始晶化温度为469℃,Fe2B第二相初始析出温度为509℃;在p=5.5GPa高压烧结条件下,随着烧结功率Pw的增加,块体合金的αFe相晶粒尺寸D逐渐增大,在10.3～14.2nm之间;块体合金的相对密度也随烧结功率Pw升高而增大,当Pw=1207W时,获得了相对密度为99.6%的αFe单相纳米晶块体合金,其饱和磁化强度Js=1.52T,矫顽力Hc=1.9kA/m。
The thermal stability of Fe_ 78Si_9B_ 13 melt-spinning strip and the influence of high-pressure sintering conditions on phase components and grain size of ball milling powder of Fe_ 78Si_9B_ 13 alloy were investigated by XRD,DTA. The results show that:α-Fe phase crystallization temperature of Fe_ 78Si_9B_ 13 amorphous alloy was about 469℃;the second phase Fe_2B crystallization temperature was 509℃;under p=5.5GPa,P_w=920～1207W,t=440s sintering conditions,the grain size of the nanocrystaline bulk Fe_ 78Si_9B_ 13 alloy increased with the sintering power from 10.3nm to 14.2nm;the relative density also increased with sintering power,under P_w=1207W sintering conditions,α-Fe phase nanocrystalline bulk alloy with 99.6% relative density could be obtained; the specific saturate magnetization J_s and coercive force H_c of as-acquired nanocrystaline bulk alloy was 1.52T and 1.9kA/m,respectively.
出处
《金属功能材料》
CAS
2005年第3期1-4,共4页
Metallic Functional Materials
基金
湖南省自然科学基金资助项目(01YJJ2056)。
