金屬材料專業(yè)英語簡單介紹-展示頁
2025-01-15 15:59本頁面
【正文】 rence 15%, the solubility is the atomic radii of solids that form solid solutions, theempirical rule given by HumeRothery is given as： Mismatch= %15100 ???????? ?s ol v e nts ol v e nts ol ut errr20 ? HumeRothery Rule 2:Crystal Structure Rule : For appreciable solid solubility, the crystal structures of the two elements must be identical. ? HumeRothery Rule 3: Valency Rule : A metal will dissolve a metal of higher valency to a greater extent than one of lower valency. The solute and solvent atoms should typically have the same valence in order to achieve maximum solubility. ? HumeRothery Rule 4: The Electronegativity Rule : Electronegativity difference close to 0 gives maximum solubility. The more electropositive one element and the more electronegative the other, the greater is the likelihood that they will form an intermetallic pound instead of a substitutional solid solution. The solute and the solvent should lie relatively close in the electrochemical series. 21 休姆－羅瑟里（ Hume－ Rothery）規(guī)律 （ 1） 形成合金的元素原子半徑之差超過 14％～ 15％ ，則固溶度極為有限；若尺寸差小于 15％， 尺寸因素成為次要的影響因素，固溶度由其他影響因素確定，這就是知名的 15％ 規(guī)律。還可制造有特殊性能的材料。 10 ? 合金的一些性質(zhì)： ? (1)多數(shù)合金熔點低于其組分中任一種組成金屬的熔點； ? (2)硬度比其組分中任一金屬的硬度大； ? (3)合金的導(dǎo)電性和導(dǎo)熱性低于任一組分金屬。 9 Something else….. ? 合金根據(jù)組成元素的數(shù)目，可分為二元合金、三元合金和多元合金。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 4 Translation I ? The outmost layer of electrons 最外層電子 ? Free election gas 自由電子氣 ? Electrical conductivity 電導(dǎo)率，電導(dǎo)性 ? Plaincarbon steel 普通碳素鋼 ? Solid solution 固溶體，固溶液，固體溶液 5 Translation II ? Intermetallic pound 金屬互化物 ? Metallic material 金屬材料 ? Strainless steel 不銹鋼 ? Solute 溶質(zhì) ? Solvent 溶劑 ? Periodic table 元素周期表 ? Electronegativity 電負性 ? Transition metal 過渡金屬 ? Crystal structure 晶體結(jié)構(gòu) 6 What is a Metal? ? Q: What is a Metal? ? A: Metal is consisted of positive centers (or ions) sitting in a “gas ” of free tends to be good electrical conductors. 7 What is an Alloy? ? Consist of a mixture of a pure and one o
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