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应用小角Ｘ射线散射（ＳＡＸＳ） 技术确定了二元Ａｌ－ ２ ．７０％ Ｌｉ 合金在４４３ ～４７３ Ｋ 温度范围内的回火析出相（δ′）长大激活能．
Binary Al-2 was determined by the small angle X-ray scattering (SAXS) technique. The activation energy of tempering precipitates (δ ’) of 70% Li alloy in the temperature range of 443 ~ 473 K.