硅化鈮 的英文怎麼說
中文拼音 [guīhuàní]
硅化鈮
英文
niobium silicide
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硅 :
名詞[化學] silicon （14號元素符號 si）
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鈮 :
名詞[化學] （金屬元素） niobium （nb）
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Methods for chemical analysis of tantalum and niobium ores - determination of niobium content - preconcentration and separation with silica gel - thiocyanate extraction photometric method
鉭礦石
鈮礦石
化學分析方法
硅膠富集分離-硫氰酸鹽萃取光度法測定鉭量
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Methods for chemical analysis of tantalum and niobium ores - determination of tantalum content - preconcentration and separation with silica gel - butyl rhodamine b extraction photometric method
鉭礦石
鈮礦石
化學分析方法
硅膠富集分離-丁基羅丹明b萃取光度法測定鉭量
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Methods for chemical analysis of ferroniobium - the gravimetric method for the determination of silicon content
鈮鐵
化學分析方法重量法測定
硅量
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The amount of nb3si / nb5si3 increases, their morphology tends to be more regular, their distribution becomes more homogeneously with the increasing of withdrawing rate. the microstructure is better oriented along the longitudinal axis of the samples when the withdrawing rate is between 0. 6 and 6. 0mm / min. at the same withdrawing rate, the microstructure changes from the beginning part to the ending part of the samples
鈮?
硅基rmics材料原始鑄態組織由初生nb基固溶體和在其間分佈的nb基固溶體+
硅化鈮共晶團組成；隨著抽拉速率的增大，定向凝固共晶組織中
硅化鈮強
化相細
化、數量增多、分佈趨于規則和均勻，定向效果顯著；在相同抽拉速率條件下，區熔試樣的組織從起始段到終止段發生了改變。
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The cracks extend along the matrix / strengthening - phases interfaces and form the cleavage steps and tear ridges. there appear some very small dimples on the fracture surfaces of the directionally solidified samples, which come from the nb - based solid solution particles in the big plates of the strengthening phases, but no dimples on the fracture surfaces of the as - cast sample. it can be concluded from above results that niobium - niobium silicide based in - situ composites ( rmics ) with a uniformly orientated microstructure can be produced by the ebfzm with high temperature gradient, and their mechanical properties can be increased
隨著抽拉速率的提高和硅化鈮強化相間距與尺度的減小，材料的室溫拉伸強度和斷裂韌性均有提高， _ b最高可達778 . 4mpa ， k _ （ ic ）達到了46 . 3mpa ? m ~ （ 1 / 2 ） ；試樣的拉伸斷口基本表現為脆性解理斷裂的花樣，裂紋沿基體強化相界面繞過強化相進行擴展，在裂紋擴展方向存在解理臺階，並形成撕裂棱。
