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利用大功率X射线衍射仪研究了Zr-1.0Sn-1.0Nb-0.3Fe合金金属间化合物的晶体结构,结果表明,Zr-1.0Sn-1.0Nb-0.3Fe合金的金属间化合物是Ti2Ni结构的立方(ZrNb)2Fe和六方Zr(NbFe)2。在轧制状态下,六方Zr(NbFe)2是主要的析出相。400℃淬火时,立方(ZrNb)2Fe是主要的析出物。750℃时,不再观察到六方Zr(NbFe)2;850℃时,不再观察到立方(ZrNb)2Fe。综合DTA和X射线测试结果,确定合金-αZr→-βZr转变开始温度为633℃,这个温度也是Zr(NbFe)2开始熔入-βZr的温度,在785℃,立方(ZrNb)2Fe开始熔入-βZr,到1000℃时,-αZr→-βZr转变结束。
The crystal structure of the Zr-1.0Sn-1.0Nb-0.3Fe alloy intermetallic compound was studied by high-power X-ray diffractometer. The results show that the intermetallic compound of Zr-1.0Sn-1.0Nb-0.3Fe alloy is cubic of Ti2Ni (ZrNb) 2Fe and hexagonal Zr (NbFe) 2. In the as-rolled state, hexagonal Zr (NbFe) 2 is the predominant precipitated phase. When quenched at 400 ℃, cubic (ZrNb) 2Fe is the main precipitates. No hexagonal Zr (NbFe) 2 was observed at 750 ° C; no cubic (ZrNb) 2Fe was observed at 850 ° C. Based on the results of DTA and X-ray measurements, it was confirmed that the transformation temperature of the alloy-αZr → -βZr was 633 ℃, which was also the temperature at which Zr (NbFe) 2 began to melt into -βZr. At 785 ℃, cubic ZrNb 2Fe began to melt -βZr, to 1000 ℃, -αZr → -βZr transition end.