纳米晶FeCuNbMSiB（M＝Nb，V，Mo）合金的微结构及其电阻率与压力的关系

MICROSTRUCTURE AND PRESSURE DEPENDENCE OF RESISTIVITY IN ALLOY FeCuNbMSiB(M=Nb,V,Mo)WITH NANOPHASE CRYSTALLIZATION

Ｘ射线衍射和透射电镜的结果表明：非晶ＦｅＣｕＮｂＭＳｉＢ（Ｍ＝Ｎｂ，Ｖ，Ｍｏ）合金在５４０℃退火２０ｍｉｎ，表面析出的纳米晶是α－ＦｅＳｉ固溶体，粒度为１０～２０ｎｍ。此外，在０．０００１～２．４ＧＰａ范围内测量了它们的常压室温电阻率以及电阻率随静水压的变化，得到了电阻率与压力的线性关系式。最后探讨了热处理方式和温度对非晶Ｆｅ＿（７３．１）Ｃｕ＿（１．２）Ｎｂ＿（３．２）＿Ｓｉ＿（１２．５）Ｂ＿（１０）合金退火形成纳米晶的影响。

The results on X-ray diffraction and transmission electron microscope indicatedthat crystallized nanophase was α-Fe(Si) solid solution in amorphous FeCuNbMSiB(M= Nb,V,Mo) alloys after annealing at 540℃ for 20 min. Graininess of α-Fe(Si)was 10～20 nm. Be-sides ,their resistivity under atmospheric prcssure and room temperature and variation of resistivi-ty with hydrcatutic pressure were measured in detail in the range from 0.0001 to 2.40 GPa. Lin-ear empirical equations of their relative resistivity to pressure were obtained by fitting on comput-er.Finally,effect of annealing mede and temperature on forming nanophase crystallization werediscussed.