薄膜材料考试题examination.pptVIP

* Zhiming YU, Dept. of MSE 中 南 大 学 材料科学与工程 Find the area densities of the (100), (110) and (111) surfaces of FCC, BCC and CTH crystals, respectively. What is the equilibrium form (EF) of a crystal? Draw an EF for CTH crystal from its Wulff-plot. It is known for diamond that its bond energy and bond length are 83 kcal/mol and 1.54?, respectively, try to calculate the SFE of its {111) surface, g111, in unit of erg/cm2。 Ns is atomic number of the surface of a cubic particle (FCC) and Nb the bulk. Try to find the radios of Ns/Nb when the particle is consisted of 1000 and 1024 gold atoms, respectively. Problems 1) 2) 3) 4) In CVD diamond, it is known equilibrium constants are 3.4·10?4Te?48352/T and 33.3e?505/T for reactions of CH4 + H ? CH3 + H2 and H2 ? 2H, respectively. Please find T dependence of [CH3] in gas mixture of CH4 and H2, i.e. [CH3]~T; and [CH3] ~[CH4] Estimate approximate Al-Cu melt composition required to evaporate films containing 2 wt%Cu from a single crucible heated to 1350 K. (assuming gCu = gAl，and it is known that at 1350 K PAl(0) = 1x10-3 torr, and PCu(0) = 2x10-4 torr, atomic weight MAl = 27, MCu = 63.7) An fcc film is deposited on the (100) surface of a single-crystal fcc substrate. It is determined that the angle between the [100] in the film and the substrate is 63.4°, what are the Miller indices of the plane lying on the film surface? To find the relationship of the condensation rate of atoms (atoms/cm2?s) and the growth rate of film (mm/h) 5) 6) 7) 8) Find and compare the data of Sputtering yield, Band Energy, MP, BP and etc., furthermore, to deduce their relation if it is possible. * Zhiming YU, Dept. of MSE 中 南 大 学 材料科学与工程