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1、Unit 6,An Introduction to Metallic Materials,We should grasp,What is a metal? What is an alloy? What are the differences between their properities? Explain solid solution and intermetallic compound.,New Words Two-phase mixture of a soild-solution and b soild-sulition; Single-phase b solid-solution.
2、单相固溶体 单相固溶体与单相固溶体混合 单相固溶体,Think about.,Q: Give examples to explain soild solution and intermetallic compound? A: For example, nickel will dissolve some aluminum,so that at low aluminum contents a solid solution is produced.However,if larger amounts of aluminum are added,then a series of intermetalli
3、c compounds(for example Ni3Al and NiAl) are produced.,Do you still remember?,roamrum graphitegrfait malleablemlibl ductiledktail solublesljubl chromiumkrumjm transitiontrnzin shellel,v.漫游，闲逛，徜徉 ； n.漫步，漫游，徘徊 n.石墨 a.有伸延性的，可锻的 a.易延展的，柔软的 a.可溶解的，可溶的 n.铬 n.转换，跃迁，过渡 n.壳，外壳,New Words from Part2 I,phase pla
4、sma precipitate ferrite austenite lattice interstitial cuboid orthorhombic tetragonal crystallography,n.相 n.等离子体，等离子区 n.沉淀物；vt.沉淀 n.铁盐酸，铁素体 n.体，奥氏体，碳丙铁 n.格子 a.空隙的，裂缝的 a.立方体的，立方形的 a.正方晶的 a.四方晶的 n.结晶学，晶体学,New Words from Part2 II,turbine blade polygonal gemstone spherical amorphous transparent pit coas
5、ter viscous interfacial,n.涡轮 n.刀刃，刀片 a.多角形的，多边形的 n.宝石 a.球形的 a.无定形的，无晶形的 a.透明的 n.坑，槽 n.垫子，银盘 a.粘性的，粘滞的，胶粘的 a.界面的，分界面的,Central Content of Part 2,The text is about structures of metals and alloys, the most familiar phases are solid, liquid, vapor and plasma. Explain crystal structure, atoms are arrange
6、d in a different pattern, the pattern is made up of a repeating unit. Because of the lattice parameter and the atoms are arranged differently within the cube, the metals and alloys have different structures-property. And the size of the atom can affect its structures-property. The differences between crystalline and amorphous metals.,What is a Phase?,Crystal Structures,Crystalline and Amorphous Metals,