【摘要】 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。更多还原

【Abstract】 Intermetallics of the Zr-1.0Sn-1.0Nb-0.3Fe alloy was identified to be cubic Ti₂Ni-struture（ZrNb）₂Fe and hexagonal Zr（NbFe）₂ by X-ray diffraction.For the as-received alloy,the hexagonal Zr（NbFe）₂ is the major intermediate phase. For the alloy annealed at the temperature higher than 400℃,cubic（ZrNb）₂Fe is the main secondary phase particle.No Zr（NbFe）₂ phase is detected at temperature higher than 750℃,and the diffraction peaks of the（ZrNb）₂Fe disappears when the temperature is higher than 850℃.Combining DTA and XRD results,the α-Zr→β-Zr transformation occurs at 633℃ accompanying the dissolve of the Zr（NbFe）₂,and with temperature increasing,（ZrNb）₂Fe starts to dissolve into β-Zr at 785℃,and the α-Zr→β-Zr transformation finishs at about 1000℃.更多还原