表面材料试题范文

表面材料试题范文表面材料试题范文 Problems topass thecourse ofSSTSF Zhiming YU Dept of MSE CSU xx 10 31 A please chooseONE of them1 What isthe surface free energy hkl of thesolid bulk Deduce theformulas ofsurfacefree energy of the SC FCC CTH andBCC respectively anddraw their3D Wulff plots 2 Comparing thetotal surfacefreeenergy hklAhkl of theSC BCC FCC CTH crystal indifferent formswhich oupya constantvolume a3 such ascube octahedron truncated octahedronand rhombicdodecahedron respectively 3 Prove therelation ofthe parameter and thecrystal form octahedron 3 respectively is definedas aratio ofSFEs 100 111 3corresponds aform of3 2corresponds acubo octahedron 1corresponds acube and 4 When CVD diamond filmgrown onMo substrate there mustbe alayer of Mo2C between the diamondand the Mo asshown inFig 1 b Calculate thechange ofthe atomicvolume ofMo whileC atomsdiffusing intotheMolattice toform theMo2C 5 In CVDdiamond the equilibriumconstants are3 4 10 4Te 48352 T and33 3e 505 T forthe reactionsof CH4 H CH3 H2and H2 2H respectively Please findT dependenceof CH3 in gasmixture ofCH4and H2 i e CH3 T and CH3 CH4 0 where CH4 0is methaneconcentration infeeding 6 Find the relationship betweenthe physicalproperties ofthe elementsin theperiodic tableof elements such asSputtering Yield Y Bond energy Eb Melting Point Tm Boiling Point Tb and giveyour explainingfor theserelationships A 1原子半径 1 除第1周期外 其他周期元素 惰性气体元素除外 的原子半 径随原子序数的递增而减小 2 同一族的元素从上到下 随电子层数增多 原子半径增大 2单质的熔点 1 同一周期元素随原子序数的递增 元素组成的金属单质的熔点 递增 非金属单质的熔点递减 2 同一族元素从上到下 元素组成的金属单质的熔点递减 非金 属单质的熔点递增3元素的金属性与非金属性 1 同一周期的元素电子层数相同 因此随着核电荷数的增加 原子越容易得电子 从左到右金属性递 减 非金属性递增 2 同一主族元素最外层电子数相同 因此随着电子层数的增加 原子越容易失电子 从上到下金属性递增 非金属性递减 7 To finda motionof anoriginally stableelectron ina motivemagic fieldB witha uniformvelocity ofv B please chooseTHREE ofthem8 It is known thatthe C C bondenergy andbond lengthare83kcal mol and1 54 respectively try tocalculate theSFE of 111 surface ofdiamond 111 respecting theunit oferg cm2 9 Ns isatomic numberofthesurface ofa cubicparticle FCC and Nbthe bulk Try tofind theradios ofNs Nb whenthe particleis consistedof1000and1024gold atoms respectively 10 Estimate approximateAl Cu meltposition requiredto evaporatefilms containing2wt Cu froma singlecrucible heatedto1350K assuming Cu Al and itisknownthat at1350K PAl 0 1 10 3torr and PCu 0 2 10 4torr atomic weightMAl 27 MCu 63 7 11 An FCCfilm isdeposited onthe 100 surface ofa single crystal FCCsubstrate It isdetermined thatthe anglebetweenthe 100 in the film and the substrateis63 4 what arethe Millerindices ofthe planelying onthefilmsurface 12 To findtherelationshipoftheatomic condensationrate ofatoms atoms cm2 s andthegrowth rateof film mm h 110 xx11220X