課程名稱︰材料科學概論 課程性質︰系選修 課程教師︰呂宗昕 開課學院：工學院 開課系所︰化工系 考試日期（年月日）︰100/11/29 考試時限（分鐘）：120 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1. (a)Describe the general criteria when solid-solutions are formed.(4%) (b)Describe the meaning of resilience and true strain.(4%) (c)Describe the meaning of anisotropy and isotropy.(4%) (d)Calculate the poisson's ration v when the materials do not have net change of volume during loading.(6%) 2. (a)Describe the Miller indoces for planes A and B.(6%) (b)Calculate the intersection of planes A and B.(6%) (c)Write the names of crystal systems which the three axes are not equal with each other.(6%) (plane A:過三點:(0.5,0,0) (0,0,2/3) (0,1,2/3) plane B:(1,0,0) (0,1,0) (1,1,1/3)) p.s.原題目是圖 3. Please prove tge bragg's law.(8%) 4. The XRD pattern of Cu (FCC structure) is shown as below. The wavelength of XRD is 0.154nm. (a)Index peaks A and B.(6%) (b)Determine the imterplanar spacing for peaks A and B.(6%) (c)Use peak B to calculate the atomic radius for Cu.(6%) (有一個圖譜) 5. (a)Use the Fig.1 to predict the difference between X and Y, and explain the reason.(6%) (圖示:力與半徑圖，兩個曲線，微分值Y>X曲線) (b)Describe the physical meaning of points A,M,F in Fig. 2. (6%) A:降伏點 M:stress最大值 F:末端 6. The diffusion coefficient for silver in Ni at 650 degree C and 900 degree C are 6.3 E(-16) and 1.2 E(-13) m^2/s, respectively. Please calculate (a)the activation energy (b)the diffusion coefficient at 800 degree C.(10% total 7. A cylindrical sample of a metal alloy is stressed in compression. If its original and fonal diameter is 17.00 and 17.05 mm, respectively, and its final length is 80mm. The elastic and shear muduli for this alloy are 58 and 26GPa. (a)Compute the original length if this alloy.(4%) (b)Compute the true strain during the compression process.(4%) (c)Compute the engineering stress during the compression process(4%) Exam ends here. -- 夜飲東坡醒復醉，歸來彷彿三更。家僮鼻息已雷鳴，敲門都不應，倚杖聽江聲。 長恨此身非我有，何時忘卻營營？夜闌風靜縠紋平，小舟從此逝，江海寄餘生。 --

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