金屬材料專業(yè)英語(yǔ)簡(jiǎn)單介紹-wenkub
2023-01-21 15:59:59 本頁(yè)面
【正文】 ? Singlephase b solidsolution. ? α單相固溶體 ? α單相固溶體與 β單相固溶體混合 ? β單相固溶體 39 Think about…. ? Q: Give examples to explain soild solution and intermetallic pound? ? A: For example, nickel will dissolve some aluminum,so that at low aluminum contents a solid solution is ,if larger amounts of aluminum are added,then a series of intermetallic pounds(for example Ni3Al and NiAl) are produced. 40 Do you still remember? ? roam[r?um] ? graphite[39。li?bl] ? ductile[?d?ktail] ? soluble[?s?ljubl] ? chromium[?kr?umj?m] ? transition[tr230。 fait] ? malleable[39。 38 ? Singlephase a soildsolution。 ? 銅鎳合金是固溶體合金，由一種金屬原子進(jìn)入另一種金屬的晶胞空隙而形成的。所以，鋁鎳合金中，每個(gè)原子有 。 32 ? a different example,NiAl is an electron pound which froms due to having a “magic” valence electrons per atom (this magic number isn?t really magic , but is a results of deviations from the free electron model). ? 另外一個(gè)不同的例子， NiAl是具有“魔法”的化合物因?yàn)槠渲忻總€(gè)原子都是 （神奇的不是數(shù)字本身，而是 自由電子模型）。 26 ? ,knowing from their position in the periodic table that Na wants to from Na+ ions and chlorine wants to from Cl ions explans why an ionic pound with a formula NaCl is observed. 從元素周期表可以知道，鈉有變成鈉離子的趨勢(shì)，氯有變成氯離子的趨勢(shì)，這就解釋了氯化鈉的形成。 11 What is an Alloy? ? Q: What is an Alloy? ? A: An alloy consists of a mixture of a pure metal and one or more other elements which can be metals or nonmetal. ? Q: What are the differences between their properties? ? A:Alloys are usually less malleable and ductile than pure metals and the tend to have lower melting points. 12 Think about….. ? Give examples to explain soild solution and intermetallic pound? 13 Solid Solutions ? In many cases ,metals are quite soluble in other metals .For example ,solid copper and soild nickel are fully soluble in each other . ? This type of perfect soild solubility is a side effect of having free the electrons are free to move ,the exact number of valence electrons possessed by any given atom shouldn’t matter . 14 ? So a “solidsolution” is that one metal serves as the solvent and the other as the other as the solute ,althought in a case like copper and nickel where these are
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