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
In the as-cast Ti-55 alloy, the intragranular rare earth-rich phase particles are about 1. 0～14 μm in diameter, elliptical, and rich in Nd, Sn, and O. The contents of Nd and Sn on the grain boundaries are higher th...In the as-cast Ti-55 alloy, the intragranular rare earth-rich phase particles are about 1. 0～14 μm in diameter, elliptical, and rich in Nd, Sn, and O. The contents of Nd and Sn on the grain boundaries are higher than those at other sites. The intragranular phases grow preferably at the region on the grain boundaries, which causes the formation of the elliptical morphology of the intragranular phases.展开更多
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。
文摘In the as-cast Ti-55 alloy, the intragranular rare earth-rich phase particles are about 1. 0～14 μm in diameter, elliptical, and rich in Nd, Sn, and O. The contents of Nd and Sn on the grain boundaries are higher than those at other sites. The intragranular phases grow preferably at the region on the grain boundaries, which causes the formation of the elliptical morphology of the intragranular phases.
基金Project (51005112) supported by the National Natural Science Foundation of ChinaProject (GF200901008) supported by the Open Fund of National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology,China
