Four ytterbium deuteride samples with D/Yb atomic ratio of 2.90、2.53、2.23 and 2.06 were prepared under high pressure metal system at 400℃,and initial deuterium pressure is 6.53MPa、3.41MPa and 1.32MPa respectively....Four ytterbium deuteride samples with D/Yb atomic ratio of 2.90、2.53、2.23 and 2.06 were prepared under high pressure metal system at 400℃,and initial deuterium pressure is 6.53MPa、3.41MPa and 1.32MPa respectively.Results indicate that satureated time of deuterium by ytterbium sample and D/Yb atomic ratios are correlated with initial deuterium pressure.XRD analytical results indicate that YbD 2.90 has a facc structure with a=0.5205nm.YbD 2.90 decomposed at 600℃,the product is YbD 2.06 and it has two phases,they are orthorhombic and another face center cubic structure.YbD 2.53 and YbD 2.23 are composed by orthorhombic and face center cubic ytterbium deuterides.展开更多
对Zr-0合金在不同温度下吸氘的PCT曲线进行了测试,并根据热力学平衡方程对其热力学参数进行了计算。结果显示,随着温度的升高,合金吸氘的平衡压增大,最大吸氘量和放氘量均逐渐增大。900℃时的平衡压及吸氘量分别为0.12 MPa和5.2%(质量分...对Zr-0合金在不同温度下吸氘的PCT曲线进行了测试,并根据热力学平衡方程对其热力学参数进行了计算。结果显示,随着温度的升高,合金吸氘的平衡压增大,最大吸氘量和放氘量均逐渐增大。900℃时的平衡压及吸氘量分别为0.12 MPa和5.2%(质量分数),放氘量为2.2%(质量分数)。Zr-0合金中析出ZrD的标准摩尔熵变为–32.74J/(K·mol),标准摩尔焓变–47.68 k J/mol,析出的平衡温度为1456 K;合金中析出δ-ZrD_(1.66)的标准摩尔熵变为–290.86J/(K·mol),标准摩尔焓变–326.55 k J/mol,析出的平衡温度为1123 K,与实验结果相符。展开更多
文摘Four ytterbium deuteride samples with D/Yb atomic ratio of 2.90、2.53、2.23 and 2.06 were prepared under high pressure metal system at 400℃,and initial deuterium pressure is 6.53MPa、3.41MPa and 1.32MPa respectively.Results indicate that satureated time of deuterium by ytterbium sample and D/Yb atomic ratios are correlated with initial deuterium pressure.XRD analytical results indicate that YbD 2.90 has a facc structure with a=0.5205nm.YbD 2.90 decomposed at 600℃,the product is YbD 2.06 and it has two phases,they are orthorhombic and another face center cubic structure.YbD 2.53 and YbD 2.23 are composed by orthorhombic and face center cubic ytterbium deuterides.
文摘对Zr-0合金在不同温度下吸氘的PCT曲线进行了测试,并根据热力学平衡方程对其热力学参数进行了计算。结果显示,随着温度的升高,合金吸氘的平衡压增大,最大吸氘量和放氘量均逐渐增大。900℃时的平衡压及吸氘量分别为0.12 MPa和5.2%(质量分数),放氘量为2.2%(质量分数)。Zr-0合金中析出ZrD的标准摩尔熵变为–32.74J/(K·mol),标准摩尔焓变–47.68 k J/mol,析出的平衡温度为1456 K;合金中析出δ-ZrD_(1.66)的标准摩尔熵变为–290.86J/(K·mol),标准摩尔焓变–326.55 k J/mol,析出的平衡温度为1123 K,与实验结果相符。
