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Huang H.W.,Science and Technology on Reactor Fuel and Materials Laboratory | Pan Y.,Kunming Institute of Precious Metals | Pan Y.,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals | Wang X.M.,Science and Technology on Reactor Fuel and Materials Laboratory | And 2 more authors.
Physica B: Condensed Matter | Year: 2011

Compared to experiment, the adsorption energies, bonding properties, and electronic structure of two different Al2O3/B4C bridge sites with seven different Al2O3 surfaces are investigated by ab initio periodic density functional theory. The Al 2O3/B4C ceramic sintered in Ar is synthesized and measured by XRD and TEM. The calculated results reveal that the densification of O-bridge site of Al2O3/B4C surface is better than that of Al-bridge. The Al2O3 (1 1 3)/B4C with O-bridge is the most favorable and stable. The electronic structure shows that the electron hybridization exists between Al, O atoms and C, B atoms. The results indicate that the calculated results are in good agreement with the experiment. © 2011 Elsevier B.V. All rights reserved.


Huang H.,Science and Technology on Reactor Fuel and Materials Laboratory | Wang X.,Science and Technology on Reactor Fuel and Materials Laboratory | Yang J.,Science and Technology on Reactor Fuel and Materials Laboratory | Xu K.,Science and Technology on Reactor Fuel and Materials Laboratory | Dai S.,Science and Technology on Reactor Fuel and Materials Laboratory
Fenmo Yejin Jishu/Powder Metallurgy Technology | Year: 2011

Al2O3/B4C composites were prepared by gel-casting and the sintering property was investigated. The DTA, chemical structure, surface morphology and phase state were investigated by Thermal analysis, SEM, XRD. The results show that the Al2O3/B4C composites sintered at 1600°C and upwards produce low melting point compounds such as Al8B2O15, which improve densification. But it also brings CO gas which is harmful.


Pan Q.,Science and Technology on Reactor Fuel and Materials Laboratory | Jiang M.,Science and Technology on Reactor Fuel and Materials Laboratory | Dai X.,Science and Technology on Reactor Fuel and Materials Laboratory | Wang G.,Science and Technology on Reactor Fuel and Materials Laboratory | And 2 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015

Influence of different annealing processes on recrystallization, mechanical properties, cross sectional reduction (CSR), ovality and corrosion behavior of the annealed N36 alloy cladding tube were studied. The results show that the recrystallization, strength, CSR and short-term corrosion resistance of the N36 alloy cladding tube annealed with bushing are similar to these without bushing under the same annealing condition, but the elongation decreased after annealed with bushing. The ovality of the tube obviously increased when annealing without bushing. © 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.


Huang H.W.,Science and Technology on Reactor Fuel and Materials Laboratory | Wang X.M.,Science and Technology on Reactor Fuel and Materials Laboratory | Yang J.,Science and Technology on Reactor Fuel and Materials Laboratory | Xu K.,Science and Technology on Reactor Fuel and Materials Laboratory | Dai S.P.,Science and Technology on Reactor Fuel and Materials Laboratory
Nuclear Engineering and Design | Year: 2011

Al2O3-14 wt%B4C composites with 0-1 wt% C addition were sintered in Ar at 1550-1650 °C. The influence of the C additive on the B loss, densification behavior, and microstructure of the Al2O3-B4C composites were investigated. The results show that there are B2O3, H3BO 3 and Al18B4O33 exist between Al2O3 and B4C interface, which result in B loss because of B2O3's high vapor tension at above 1500 °C. The presence of Al18B4O33 grains formed by chemical reaction of Al2O3 with surface oxides on B4C inhibit the densification of pellets by reducing the specific free surface energy of the Al2O3. However, the added C eliminates those oxides to reduce B loss because of its higher activity than B4C, and it also coarsens Al2O3 grain although the density of pellets is decreased by gas products. © 2011 Elsevier B.V. All rights reserved.


Chen L.,Science and Technology on Reactor Fuel and Materials Laboratory | Yang Z.,Science and Technology on Reactor Fuel and Materials Laboratory | Miao Z.,Science and Technology on Reactor Fuel and Materials Laboratory | Dai X.,Science and Technology on Reactor Fuel and Materials Laboratory | Sun C.,Science and Technology on Reactor Fuel and Materials Laboratory
International Conference on Nuclear Engineering, Proceedings, ICONE | Year: 2013

The nodular corrosion tests of improved Zr-4 tubes and two types of N36 tubes were carried out in 500 °C, 10.3Mpa super-heated steam. The results shown corrosion resistance of N36 tubes was much better than lmpr.Zr-4 tubes. Characteristics of the second-phase particles and the oxide layer formed on N36 tubes were analyzed by scanning electronic microscope. The volume fraction of t-ZrO2 in oxide was calculated by Laser-Raman spectroscopic analysis. In connection with corrosion kinetics, the effect of SPPs size and volume fraction of t-ZrO2 in oxide related to corrosion resistance was discussed. It was pointed out that nodular corrosion resistance of N36 tubes can be improved by SPPs. Copyright © 2013 by ASME.

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