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金屬材料專業(yè)英語簡單介紹-閱讀頁

2025-01-21 15:59本頁面
  

【正文】 vely ,there are (0+3)/2= valence electrons per atom in NiAl. ? 鎳作為一種過渡金屬,可以將外層電子“隱藏”在次外電子層的空軌道,看起來沒有價電子。 35 ? 合金的組成多種多樣,可分為混合物合金,固溶體合金和金屬化合物合金等類型。這種合金有低共熔點(diǎn)的特征,類似于某些鹽的水溶液使水在低于零度時才結(jié)冰一樣。 ? 我們上面所講的鋁鎳合金是金屬化合物合金,這類合金原子以金屬鍵相互作用,不遵守化合價規(guī)則。 36 ? in cases where intermetallic formation does not occur ,there may not be perfect solidsolubility ,if tow metals have different crystal structures then at some intermediate position there will have to be a change from the crystal structure of one metal to that of the other . ? 即使兩種金屬形成的晶體沒有缺陷,也不能說明它們能形成完美的固溶體,如果兩種金屬有不同的晶格結(jié)構(gòu),必須在介質(zhì)中改變一種金屬的晶格結(jié)構(gòu),使其與另外一種金屬的晶格結(jié)構(gòu)相適應(yīng) 37 ? such a case the result would be ,on gradually changing the position of an alloy from pure metal A(froming the aphase )to pure metal B (froming the bphase) ? 為了形成這種晶格,逐漸將合金從 A( α相)變到 B( β相)。 ? Twophase mixture of a soildsolution and b soildsulition。gr230。m230。n?zi??n ] ? shell[?el] ? ,閑逛,徜徉 ; ? ,漫游,徘徊 ? ? ,可鍛的 ? ,柔軟的 ? ,可溶的 ? ? ,躍遷,過渡 ? ,外殼 41 New Words from Part2 I ? phase ? plasma ? precipitate ? ferrite ? austenite ? lattice ? interstitial ? cuboid ? orthorhombic ? tetragonal ? crystallography ? ? ,等離子區(qū) ? ; ? ,鐵素體 ? ,奧氏體,碳丙鐵 ? ? ,裂縫的 ? ,立方形的 ? ? ? ,晶體學(xué) 42 New Words from Part2 II ? turbine ? blade ? polygonal ? gemstone ? spherical ? amorphous ? transparent ? pit ? coaster ? viscous ? interfacial ? ? ,刀片 ? ,多邊形的 ? ? ? ,無晶形的 ? ? ,槽 ? ,銀盤 ? ,粘滯的,膠粘的 ? ,分界面的 43 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 arranged 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 structuresproperty. And the size of the atom can affect its structuresproperty. The differences between crystalline and amorphous metals. 44 What is a Phase? 45 Crystal Structures 46 Crystalline and Amorphous Metals
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