first phase reaction 中文意思是什麼
first phase reaction
解釋
第一相反應-
The development of adscititious particle reinforced aluminium matrix composites and al matrix in - situ composites reinforced by reaction synthesis " reinforcement phase are reviewed at first. and the papers point out the difficulties and problems on the study of al matrix composites at present
本文首先回顧了外加顆粒增強鋁基復合材料和反應合成強化物增強鋁基原位復合材料的研究進展，指出當前鋁基復合材料研究中存在的問題。 -
According to the nb - si phase diagram, the temperature of 1550 ?, which is lower than the eutectoid transformation temperature of nbssi ( 1783 ? ), is chosen for heat - treatment. according to the present conditions of the furfaces, heat - treatment by stages is first proposed for the nb - si system intermetallic composites to keep the furface in good conditions. the results indicate that the equilibrium nb + nbssia dual - phase microstructure of the nb - si system intermetallics forms gradually via such eutectoid reaction as nbasi ? nb + nbssis with the heat - treatment time
根據nb - si二元相圖，選擇略低於nb _ 3si共析轉變溫度t _ f = 1783的1550對鑄態nb - si系金屬間化合物進行不同時間（ 25h - 100h ）的熱處理，並根據目前國內和我院熱處理爐的現狀，首次提出採用分段熱處理的方法來解決nb - si合金熱處理溫度高、連續熱處理時間過長而影響熱處理爐壽命的困難。 -
Caculation is carried through adopting mechanism function of the first order reaction, f1 : f ( ) = l -. the results have good linear relativities, a, the precipitated fractions are excellently representative, and f1 is ascertained the most probably mechanism function of " phase precipitation. the electric field reduces activation energies of " phase precipitation and average sizes of " particles both in 2090 and 1420 alloys
採用一級反應的模型函數f1 ： f （ ） = 1 - ，計算了相析出的動力學，計算結果具有良好的線性相關性，並且具有很好的代表性，確定f1為相析出的最概然機理函數；電場固溶使2090合金和1420合金升溫時效過程的相析出激活能有一定程度的減小，並減小了相顆粒的平均尺寸。 -
Abstract : first, the key magnet statuses and their pertinent mmf. position of exterior rotor brushless dc motor are described in this paper. second, the air - gap magnetic field and the armature reaction of the three - phase six - step exterior rotor brushless dc motor used in electrical bicycle are analyzed by means of mmf. vector, mmf. integration and magnetic field fem respectively. some valuable conclu - sions for designing this kind of motor are obtained
文摘:給出了外轉子無刷直流電動機的典型磁狀態及其對應的磁勢矢量位置，並用磁勢矢量合成法、磁勢積分法及電磁場的有限元方法對電動自行車用三相六狀態外轉子無刷直流電動機的氣隙磁場及電樞反應進行了詳盡的分析，從而得到有益於該種電機設計的結論。 -
B _ 2o _ 3 melted in 450, then mg melted in 650, the three phase reaction was taken place from 730, zro _ 2 reacted with mg at first, then was the redox reaction of b _ 2o _ 3 and mg, finally was the synthetic reaction of b and zr
差熱分析表明:該反應過程經由多個中間反應直至最後完成， b _ 2o _ 3在450熔化， mg在650熔化，三相反應的發生始於730 。首先發生的反應是zro2和mg的還原反應，其次是b _ 2o _ 3和mg的還原反應，最後是zr和b反應合成zrb2 。 -
The electrocatalytic activities of the pt / c catalyst prepared with the solid phase reaction method for the ethanol oxidation is reported for the first time. it was found that the electrocatalytic activity of the pt / c catalyst with 20 % pt prepared with the solid phase reaction method is much better than that of the pt / c catalyst prepared with the traditional liquid phase reaction method
首次研究了用固相反應法制得的pt c催化劑對乙醇氧化的電催化活性，發現用固相反應法制得的含pt量為20的pt c催化劑對乙醇氧化的電催化活性遠高於傳統的液相反應法制得的pt c催化劑。
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