義守大學 98 學年度博士班入學招生考試
試題學系別 材料科學與工程學系 博士班 考試日期 98/5/16
考試科目 材料科學 頁碼/總頁數 1/1
※此為試題卷。答案請另寫在答案卷內，未寫於答案卷內者，不予計分。
※本科不可使用計算機。
一、 問答題 (1-10 題，每題 10 分，共 100 分)
(1) Please briefly illustrate the theories of Rutherford Backscattering Spectroscopy (RBS) and X-ray Photoelectron Spectroscopy (XPS). Please also compare their strengths and
limitations in material analysis.
(2) Please briefly illustrate the theories of the following analytical methods and compare their applications: (a) X-ray Diffraction (XRD), and (b) X-ray Fluorescence (XRF).
(3) Compare the thermal conductivities of silver, stainless steel, diamond and rubber. Please give a list in order of highest to lowest thermal conductivity. Explain the reasons in brief.
(4) Consider the pressure effect on the equilibrium temperatures of a single component system. Explain why the melting point of ice decreases with increasing pressure.
(5) Lots of dislocations are generated in a metal after plastic deformation. Please briefly illustrate the effects of the increased dislocation density on the electrical conductivity, thermal conductivity and yield strength of the metal respectively. Explain the reasons in brief.
(6) Please calculate the atomic packing factors of FCC and BCC structure.
(7) Briefly explain why the recrystallization temperature of a metal is usually raised by adding more solute atoms.
(8) Please briefly illustrate piezoelectricity and explain the mechanism.
(9) Define engineering stress, engineering strain, true stress and true strain. Derive equations to relate engineering and true stress and strain.
(10) What are the major factors that affect the hardenability of steels? Explain the reasons in brief.
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