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利用小角X射线散射(SAXS)技术测试了Cu-0.69Cr-0.13Zr合金在470℃时效时析出相粒径的统计尺寸。结果表明,Cu-0.69Cr-0.13Zr合金在470℃下时效,保温时间在1.5~3.5 h间,析出相的粒径统计大小为4.97~5.48 nm,析出相粒子随时效时间延长无明显长大;使用透射电子显微镜观测时效温度为470℃时效时间为2.5 h样品中析出相粒子,测量粒径约为5 nm。2种测量方法所获得的析出相粒径尺寸无明显差异,相互吻合较好。证明小角X射线散射法测量Cu-0.69Cr-0.13Zr合金时效析出相尺寸是准确的。该方法可用于测量Cu-0.69Cr-0.13Zr合金时效析出相尺寸,比透射电镜测量方法更具有统计意义和参考价值。
The statistical size of precipitated phase of Cu-0.69Cr-0.13Zr alloy was measured by SAXS at 470 ℃. The results show that the aging time of Cu-0.69Cr-0.13Zr alloy at 470 ℃ is between 1.5 and 3.5 h, the statistical size of the precipitated phase is 4.97-5.48 nm, and the precipitated phase does not grow obviously with the aging time ; TEM was used to observe the aging temperature of 470 ℃ aging time of 2.5 h sample precipitation phase particles, the measured particle size of about 5 nm. There was no significant difference in the size of precipitates obtained by the two kinds of measurement methods, and the mutual agreement was good. It is proved that the size of precipitated phase in Cu-0.69Cr-0.13Zr alloy is small when X-ray scattering is used. The method can be used to measure the size of the precipitated phase of Cu-0.69Cr-0.13Zr alloy, which has more statistical significance and reference value than the TEM measurement method.