摘要
测定了Ｆｅ_（７３．５）Ｃｕ_１Ｎｂ_３Ｓｉ_（１３．５）Ｂ_９合金的单辊快淬制备态条带及其经热处理后的室温透射Ｍｓｓｂａｕｅｒ谱．制备态谱为典型非晶展宽六线谱，其内磁场平均值Ｈｉ＝１７．０１ＭＡ／ｍ．在Ｎ_２气氛保护下经４８０℃退火０．５ｈ已有明显结构弛豫或部分晶化发生；５３０℃退火１ｈ后样品已显著晶化，其主要组成为α－Ｆｅ（Ｓｉ）固溶体纳米晶和剩余非晶相，后者约占３９．１％，并随退火温度升高而减少，至６２０℃退火后约为２５％．非晶相的Ｈｉ值在结构弛豫阶段稍有上升，而在显著晶化温度以上则随温度升高而减小．在５５０℃退火样品中存在不同取向的体相磁织构．
The Mssbauer spectra of some Fe_(73.5)Cu_1Nb3Si_(13.5)B_9 alloy samples as-quenched or after annealing at different temperatures have been measured at room temperature.The spectrum of as-quenched sample exhibits a typical broadened sextet as amorphous with mean internal field=17.01 MA/m.The structural relaxation or partial crystallization started after annealing at 480 to 500℃ for 0.5 h in N_2 atmosphere.General crystallization occurred remarkabley when annealed at 530℃ and above.The α-Fe(Si) nanocrystalline solid solution and residual amorphous are the two main phases after annealing at 530℃ for 1h and the relative amount of the amorphous is about 39.1%.The amount of residual amorphous phase decreases with increasing annealing temperature,down to about 25% when annealed at 620t.The internal field of the amorphous also decreases with increasing annealing temperature when general crystallization occured,however it increases a little at the structural relaxation stage.The nearest neighbour Fe atoms number distribution of Mossbauer atom in α-Fe(Si) solid solution has been calculated according to their correspondent subspectrum areas.The concentration of Si in the α-Fe(Si) phase and the ordering degree of the solid solution can also be estimated in the same way.Finally,bulk magnetic texture with different orientation has been found in the sample annealed at 550℃.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第2期B066-B071,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金
中国科学院金属研究所快速凝固非平衡合金国家重点实验室资助
关键词
MOSSBAUER谱
纳米晶合金
M ssbauer spectrum,nanocrystalline alloy,FeCuNbSiB alloy
