熔區凝固 的英文怎麼說
中文拼音 [róngqūnínggù]
熔區凝固
英文
zone freezing-
On account of the solidification character of rare earth alloys, the zone melting is improved by putting the alloys prepared by arc - melting into the quartz tube, then melting
鑒于稀土化合物凝固結晶的特點，對區熔法進行了改進，將電弧爐熔煉好的樣品裝入石英管中，封石英管后在區熔設備上進行區熔。Therefore, in this paper, two directional solidification methods, czochralski method and electron - beam floating zone melting method, were used to obtain such material. the directional solidifition microstructures of si - tasi2 system was performed using neophot - 1, amray - 100b sem and jem - 2000cx tem analysis technique
本文採用切克拉斯基法（ cz法）和電子束區熔法（ ebfzm ）兩種定向凝固方法制備該共晶自生復合材料；藉助金相技術、電鏡技術、圖象處理技術等多種分析測試手段，考察了si - tasi _ 2共晶定向凝固組織和及其相應的工藝規范。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。The tensile ruptures of both the as - cast and the directionally solidified samples are of brittle fracture mode at room temperature
原始鑄態試樣和電子束區熔定向凝固試樣的室溫拉伸均表現出脆性斷裂的特徵。Layers of carbonate limestones, silty mudstones, quartz sand and solidified lava show that within the past 600 million years, this area was a warm, shallow sea, then a muddy swamp, then a vast desert of shimmering hot dunes, then a glacial ice sheet, then a shallow sea once again
層層的碳酸石灰巖、粉砂質泥巖、石英砂和凝固的熔巖，顯示在過去六億年間，這個區域曾經是溫暖的淺海，接著依序變成泥濘的沼澤、擁有炙熱沙丘的廣闊沙漠，然後是冰川，后來又再度成為淺海。4 nano - al2o3 material is pressed to slice and is sintered by laser. with the hardness tests, some process parameters are determinated suitably. laser - cladding nano - ceramic material creates a new applied future for nano - material. compared to traditional methods, it has many advantages such as consuming less material, cooling more rapid, laser - cladding many kinds of metal and alloy on other metal and alloy
激光熔覆納米陶瓷開辟了一個新的納米材料應用前景，和傳統方法相比能進行選區熔覆，材料消耗少：冷速快，發生非平衡凝固，組織細小，可使納米材料仍然在納米尺度：許多合金和金屬能夠熔覆到其他的合金和金屬上。The connection of microstructure and floating zone melting process was studied
利用ebfzm法，本文研究了區熔工藝和凝固組織之間的關系。In this paper, an ingot of niobium - niobium silicide based in - situ composites ( rmics ) was prepared by arc melting process, and nb - nb3si / nb5si3 in - situ composites with a uniformly orientated microstructure were produced in a high temperature gradient directional solidification apparatus named electron beam floating zone melting ( ebfzm ). the relationships between the processing parameters and the characteristics of the solidified microstructure have been investigated. the influence of the microstructure on the mechanical properties has been revealed and the rupture mechanism at room temperature has been discussed
本文採用真空電弧自耗熔煉法制備了鈮?硅基rmics材料的母合金錠，並採用電子束區熔（ ebfzm ）高溫度梯度定向凝固裝置制備了定向效果良好的nb - nb _ 3si nb _ 5si _ 3共晶自生復合材料，並對其定向凝固工藝參數和組織之間的對應規律、組織特性進行了研究，探討了凝固組織對室溫力學性能的影響及其斷裂機制。分享友人