The total internal partition sums （TIPS） are calculated at the temperature up to 6000 K for 12 C16 02. Using the calculated partition functions, we produce the line intensities of v3 band of 12C1602 at several high ...The total internal partition sums （TIPS） are calculated at the temperature up to 6000 K for 12 C16 02. Using the calculated partition functions, we produce the line intensities of v3 band of 12C1602 at several high temperatures. The results show that the calculated line intensities are in very good agreement with those of HITRAN database at the temperature up to 3000 K, which provides a strong support for the calculations of TIPS and line intensities at high temperature. Then the calculation is extended to further high temperature, and the simulated spectra of u3 band of 12C1602 at 5000 and 6000 K are reported.展开更多
为改善镁合表面高温氧化膜性能,采用CO_(2)矿化技术对AZ80-0.38Nd(质量分数/%,下同)合金表面高温氧化膜进行了处理。对比考察了合金氧化膜CO_(2)矿化处理前后的微观形貌、结构及物相,并采用浸泡和电化学测试技术研究了膜层的腐蚀防护性...为改善镁合表面高温氧化膜性能,采用CO_(2)矿化技术对AZ80-0.38Nd(质量分数/%,下同)合金表面高温氧化膜进行了处理。对比考察了合金氧化膜CO_(2)矿化处理前后的微观形貌、结构及物相,并采用浸泡和电化学测试技术研究了膜层的腐蚀防护性能。结果表明,AZ80-0.38Nd合金表面高温氧化膜具有典型的裂纹与孔洞缺陷,CO_(2)矿化处理很好地修复了合金表面高温氧化膜缺陷,提高了氧化膜层的致密度,并在合金表面构筑由棒状MgCO_(3)·3H_(2)O和层片状4MgCO_(3)·Mg(OH)2·4H 2O组成的矿化膜。相比于氧化膜,矿化膜可将合金自腐蚀电位(E corr)由-1.41 V SCE提高至-1.33 V SCE,将合金自腐蚀电流密度(i corr)由1.62×10^(-4)A/cm^(2)减小至2.47×10^(-5)A/cm^(2)。此外,矿化膜还能将合金局部腐蚀转变为均匀腐蚀,呈现优异的腐蚀防护性能。展开更多
The influence of different factors on the plasma chemical reactions is widely studied today. However, insufficient consideration is given to the research of paramagnetic phenomena which takes place in plasma systems. ...The influence of different factors on the plasma chemical reactions is widely studied today. However, insufficient consideration is given to the research of paramagnetic phenomena which takes place in plasma systems. The results of modeling the process of redistribution carbon isotopes between different phases while oxidizing it in high-frequency low-temperature plasma in an external magnetic field are shown in the article. The equilibrium concentrations of components involved in the oxidation process in a plasma system are defined. A principle possibility of isotope-selective plasma chemical reactions in a magnetic field was experimentally determined. The increase of concentration of 13C in the gas phase up to 1.3 times relative to natural abundance was obtained. It was found that the content of the carbon heavy isotope in the gas phase depends on the magnetic field action area. The best results were achieved with the combination of magnetic field impact area and the priority area of the appearance of plasma chemical reactions products.展开更多
基金The project supported by National Natural Science Foundation of China under Grant No. 10676025, and the Research Fund for the Doctoral Program of High Education of China under Grant No. 20050610010
文摘The total internal partition sums （TIPS） are calculated at the temperature up to 6000 K for 12 C16 02. Using the calculated partition functions, we produce the line intensities of v3 band of 12C1602 at several high temperatures. The results show that the calculated line intensities are in very good agreement with those of HITRAN database at the temperature up to 3000 K, which provides a strong support for the calculations of TIPS and line intensities at high temperature. Then the calculation is extended to further high temperature, and the simulated spectra of u3 band of 12C1602 at 5000 and 6000 K are reported.
文摘为改善镁合表面高温氧化膜性能,采用CO_(2)矿化技术对AZ80-0.38Nd(质量分数/%,下同)合金表面高温氧化膜进行了处理。对比考察了合金氧化膜CO_(2)矿化处理前后的微观形貌、结构及物相,并采用浸泡和电化学测试技术研究了膜层的腐蚀防护性能。结果表明,AZ80-0.38Nd合金表面高温氧化膜具有典型的裂纹与孔洞缺陷,CO_(2)矿化处理很好地修复了合金表面高温氧化膜缺陷,提高了氧化膜层的致密度,并在合金表面构筑由棒状MgCO_(3)·3H_(2)O和层片状4MgCO_(3)·Mg(OH)2·4H 2O组成的矿化膜。相比于氧化膜,矿化膜可将合金自腐蚀电位(E corr)由-1.41 V SCE提高至-1.33 V SCE,将合金自腐蚀电流密度(i corr)由1.62×10^(-4)A/cm^(2)减小至2.47×10^(-5)A/cm^(2)。此外,矿化膜还能将合金局部腐蚀转变为均匀腐蚀,呈现优异的腐蚀防护性能。
文摘The influence of different factors on the plasma chemical reactions is widely studied today. However, insufficient consideration is given to the research of paramagnetic phenomena which takes place in plasma systems. The results of modeling the process of redistribution carbon isotopes between different phases while oxidizing it in high-frequency low-temperature plasma in an external magnetic field are shown in the article. The equilibrium concentrations of components involved in the oxidation process in a plasma system are defined. A principle possibility of isotope-selective plasma chemical reactions in a magnetic field was experimentally determined. The increase of concentration of 13C in the gas phase up to 1.3 times relative to natural abundance was obtained. It was found that the content of the carbon heavy isotope in the gas phase depends on the magnetic field action area. The best results were achieved with the combination of magnetic field impact area and the priority area of the appearance of plasma chemical reactions products.
