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| 1 | Recent progresses on designing and manufacturing of bulk refractory alloys with high performances based on controlling interfaces显示文摘Refractory alloys such as tungsten and molybdenum based alloys with high strength,thermal/electrical conductivity,low coefficient of thermal expansion and excellent creep resistances are highly desirable for applications in nuclear facilities,critical components in aerospace and defense components.However,the serious embrittlement limits the engineering usability of some refractory alloys.A lot of research results indicate that the performances of refractory alloys are closely related to the physical/chemical status,such as the interface dimension,interface type,interface composition of their grain boundaries(GBs),phase boundaries(PBs)and other interface features.This paper reviewed the recent progress of simulations and experiments on interface design strategies that achieve high performance refractory alloys.These strategies include GB interface purifying/strengthening,PB interface strengthening and PB/GB synergistic strengthening.Great details are provided on the design/fabrication strategy such as GB interface controlling,PB interface controlling and synergistic control of multi-scaled interfaces.The corresponding performances such as the mechanical property,thermal conductivity,thermal load resistance,thermal stability,irradiation resistance,and oxidation resistance are reviewed in the aspect to the effect of interfaces.In addition,the relationships between these interfaces and material properties are discussed.Finally,future developments and potential new research directions for refractory alloys are proposed. | T.Zhang H.W.Deng Z.M.Xie R.Liu J.F.Yang C.S.Liu X.P.Wang Q.F.Fang Y.Xiong | 2020 | Journal of Materials Science & Technology2020，52，17： | 6 |
| 2 | EFFECTS OF Pb COMPOUND ADDITIVES ON THE PROPERTIES OF YBa_2Cu_3O_(7-δ)显示文摘The melting temperature and critical transition temperature Tc of YBa2Cu3O7-δ with deferent content additives of PbO and BaPbO3 were studied. When PbO was doped in YBa2Cu3O7-δ, the melting temperature of YBa2Cu3O7-δ was reduced, however its superconductivity was weakened. From the XRD pattern of the sintered mixture of YBa2Cu3O7-δ and PbO, it was known that there was a reaction between YBa2Cu3O7-δ and PbO, and the product was BaPbO3. Hence different contents of BaPbO3 (10mass%, 20mass% and 30mass%) were added in YBa2Cu3O7-δ. It was proved that there were no reactions between YBa2Cu3O7-δ and BaPbO3. And the superconductivity of the mixtures was much better than that of the samples with PbO additive. | F.H.Li Z.G.Fan J.Wang C.S.Liu D.W.Soh Y.J.Cho | 2005 | Acta Metallurgica Sinica(English Letters)2005，18，2： | 3 |
| 3 | Analysis of equivalent dynamic reliability with repairs under partial information显示文摘 | K.S.Wang H.J.Po F.S.Hsu C.S.Liu | | 0，，01： | 1 |
| 4 | 长寿命密封式金属蒸气激光器显示文摘 | C.S.Liu D.W.Feldman | 1980 | 激光1980，，1： | 1 |
| 5 | THE REINFORCING MECHANISM OF TiB2 IN TiB2/A357 COMPOSITE显示文摘Mechanical properties were tested for in situ TiB2/A357 composite fabricated by LSM (mixed salts reaction) method. Microstructures of as cast and plastic deformed TiB2/A357 were investigated. The results show that there is a low misfit between (200)A1 and (101)TiB2 with [011]Al // [101]TiB2. There is a change from fully dendritic structure of the α-Al of A357 to a rosette-type structure of TiB2/A357. Significant increases in proof stress and Young's modulus can be obtained at low TiB2 additions. There exist dislocation loops around neighboring TiB2 particles with about 0. 1ηm in diameter and dislocation multiplication near TiB2 particles. | B.Yu Y.J.Zhang Z.X.Zhao~ F.X.Zhao: Q.K.Cai C.S.Liu | 2003 | Acta Metallurgica Sinica(English Letters)2003，16，5： | 1 |
| 6 | Effect of laser power on porosity and mechanical properties of GH4169 fabricated by laser melting deposition显示文摘The porosity and mechanical properties of GH4169(a precipitation strengthened nickel-base superalloy)specimens fabricated using the laser melting deposition technique at different laser powers were investigated.The results showed that the dendritic structure with the Laves phase and carbides embedded in the Ni-γ matrix formed in the as-fabricated GH4169 due to the strong temperature gradient and the high cooling rates.Porosity remarkably decreased first and slightly increased subsequently as the laser power increased from 300 to 800 W.The lowest porosity of the specimens characterized by 3D X-ray tomography is 0.28%.The specimens fabricated at 600 W tensiled along the direction perpendicular to the building direction exhibit the average yield strength of 587 MPa,the ultimate tensile strength of 903 MPa,and the elongation at fracture of 13.6%.Furthermore,the fatigue limit of the 600 W fabricated specimens is 173.7 MPa corresponding to the fatigue ratio of 0.1.And the relationship among the porosity,laser power and mechanical properties is discussed. | W.W.Shao B.Zhang Y.Liu C.S.Liu P.Tan S.Shang G.P.Zhang | 2019 | Tungsten2019，1，4： | 1 |
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