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示悬浮液消光系数,m-1;s表示光子移动距离,m. 图1 纳米颗粒悬浮液中光子传播示意图 Fig. 1 Schematic diagram of photon propagation in NP suspension 2 模型验证 为保证数值模拟的准确性,在计算前需要对模型进行验证.对于颗粒光学特性的计算,Mie理论计算出的解析解被认为是精确解,通常用于FEM模型的验证.图2(a)所... conversion at medium temperature based on magnetic nanofluids[J]. Chinese Science Bulletin, 2019, 64(28/29): 3041-3048. [13] CAI Yaomin, NAN Yi, GUO Zhixiong. Enhanced absorption of solar energy......
value of Gibbs free energy change. Accordingly Cr23C6 exhibits the highest thermal stability. According to the data in Ni-Cr binary phase diagram, when the C content in this alloy... observed and was labeled as region P in Fig.2(b). Very fine chromium carbide is homogeneously distributed in the NiCr matrix, and even the carbide phase in large portion of this material is hard......
in Figs. 4 (a) and (b), which is different from Ti48Al alloy. According to binary Ti-Al phase diagram, a fully lamellar structure will be produced by heat treatment at α phase field with furnace cooling... treated at 1400 °C for 0.5 h followed by furnace cooling. Subsequently, the heat treated samples were aged at 900 °C for 24 h. To identify the phase content, X-ray diffraction (XRD) analysis was conducted......
), Al3Sc and Al3Zr phases at different cooling rates and there is no prominent change in the phases. HORI et al [18] suggested that the Al3Zr particles present stable D033 Al3Zr phase in Al-1.0%Zr alloy under the cooling rate of 100 K/s, metastable L12 phase contrarily. However, at cooling rate of ~1 K/s, most of Al3Zr phase still forms the same structure of the Al3Zr phase which forms at other......
phase flow and alumina multicomponent model The melt flow is governed by the laws of mass conservation, momentum conservation and energy conservation, which can be described by the Navier- Stokes... the volume fraction, density, effective viscosity, pressure and velocity of the α phase, respectively; Mα is the interphase surface force; and SMα is the external force. The external force are mainly......
is a relaxation factor, F-1 is inverse of suitable latent heat function for a binary alloy with Scheil’s behavior depending on phase diagram of the solution, ΔV is the volume of a computational cell centered... a volume of fluid (VOF) method for tracking the metal-air interface during filling and an enthalpy-based macro-scale model for the phase change process. The influence of two key process parameters......
mm×42 mm×14 mm. The wall thickness was 4 mm and the bottom-thickness was 6 mm. Fig. 1 Schematic diagram of blank by unidirectional cold pressing Fig. 2 Schematic diagram of semi-solid thixoforming...). The hot-pressed billet was heated again in the mold, and under certain temperature and pressure, the semi-solid sample went through a thixotropic process. Extra liquid phase would flow out......
at the interface by an energy spectrum analysis [19,20]. Fig. 1 Schematic diagram of test specimen for soldering joint (unit: mm) Fig. 2 Thickness measuring schematic diagram of solder/ substrate interface... of the alloy increases due to the Bi addition. Studies show that the appropriate adding quantity of Bi in Sn-Zn alloys is not more than 6%. The pasty range and the precipitation of the primary Zn-rich phase......
stir welding [9], transient liquid phase (TLP) bonding [10], and laser welding [11, 12] were investigated to achieve the reliable joining of magnesium alloys. However, weldments configurations... Chemical composition of base metals and filler wire (mass fraction, %) Figure 1 Schematic diagram of experimental set-up for TIG welding Table 2 Welding parameters used in present study After......
, and no radioactivity [1–3]. It is usually prepared by melt crystallization, controlling different temperatures of the mother phase glass with the different chemical composition [4–7]. JANG et al [8] melted the parent material at 1863 K and prepared 0.9Ca0.9Mg0.1SiO3- 0.1CaMgSi2O6 glass ceramics under different temperatures. SALMAN et al [9] used Na2O-K2O- CaO-SiO2-F glass as the parent phase, melted......