陰電元素 的英文怎麼說
中文拼音 [yīndiànyuánsù]
陰電元素
英文
electronegative element-
The result shows that with the addition of rare earth elements, ultrasonic irradiation and magnetic field, the chemical component, surface configuration, microstructure and properties of electroless co - ni - b and co - fe - b alloy changes remarkably. such kind of change can be described as the followings. firstly the depositing speed of electroless alloy bath is raised while the polarizability and cathodic overpotential are reduced ; secondly the surface quality of the alloy coating and adhesion of the coating and matrix are improved ; thirdly in the coatings the content of the elements in the transient group increases, but the content of cobalt decreased ; fourthly the amorphous structure is transformed to microcrystal structure and polycrystal structure ; fifthly the microhardness and wear resistance of the coating are enhanced ; sixthly coercitive force is reduced, and magnetoconductivity of the coating is increased ; lastly the magnetic intensity of the coating increases with the addition of energy and light rare earth elements such as ce, la and decreases with the addition of heavy rare earth elements such as y. on the other side, when the alloy coatings passes through the heat treatment under the temperature of 250 or 500, their properties will change
結果顯示化學沉積co - ni - b 、 co - fe - b工藝在稀土元素( ce 、 la 、 y 、 dy ) 、能量(超聲波、磁場)介入后,沉積過程、合金成分、鍍層形貌結構和性能都有顯著變化,表現在:鍍液的陰極極化過電位和極化度降低,沉積速度提高;鍍層的結合力、表面質量改善;鍍層中過渡族元素的含量增加,輕元素硼的含量降低,同時證實了稀土元素與過渡族元素共沉積的可能性;鍍層的顯微結構由非晶態向微晶和多晶態轉變;鍍層的顯微硬度與耐磨性提高,力學性能優化;鍍層的矯頑力降低;磁導率提高;鍍層的磁化強度在能量(超聲波、磁場)和輕稀土元素ce 、 la介入后提高,重稀土元素y介入后降低。Hot shock and cathode electrolysis experimental results indicate the interface adhesion strength between coating and aluminum matrix is excellent. the element electronic probe image provide that the two composition are co - deposition ; structure analysis by xrd ( x - ray diffraction ) demonstrated that cr exists in the way of solid solution in the coating
Sem和金相觀測結果表明浸鎳后鍍層結晶緻密、厚度均一;熱震及陰極電解結果說明鍍層與基體結合牢固緊密;鍍層元素電子探針掃描圖說明鎳鉻兩種元素均勻沉積; xrd分析證明鍍層中鎳鉻以固溶體的形式存在。This research has studied the microstructure of cathode materials systematically by the means of high resolution transmission electron microscopy and scanning electron microscopy, surveyed the electron emission performance of la2o3, - mo, la2o3 - y2o3 - mo, la2o3 - sc2c > 3 - mo cathode with the self - designed electron emission surveyor and analyzed the elements changing of the surface of mo - la2o3 - sc2c > 3 cathode in - situ. while it was heated to different temperature. at last, the relationship of the microstructure of cathode, diffusion of active matter and electron emission performances has been discussed
本研究採用高分辨掃描電鏡、透射電鏡對稀土鉬鎢陰極材料的顯微結構進行了系統研究;利用本課題研究組設計研製的電子發射測量儀對la2o3 - mo , la2o3 - sc2o3 - mo , la2o3 ? y2o3 - mo三種陰極(以下稱鑭?鉬陰極、鑭鈧?鉬陰極、鑭釔?鉬陰極)的發射性能進行了測量;利用經改造后的俄歇電子能譜儀「原位」分析了發射性能較好的鑭鈧鉬陰極在不同溫度下表面活性元素的變化情況。To find a proper and convenient way in electron emitter research, in the paper, we have discussed the essential and possibility of setting up a new pld ( pulsed laser deposition ) device which connects with aes ( auger energy spectra ), and built such device in order to complete cathode deposition and analysis without exposing to the atmosphere and carried out cathode in - situ preparation and analysis electron emission phenomenon is a physical process taken place in surface of electron emitter
為了解決電子發射體(陰極)研究方法中存在的問題,並尋求一種適當的、方便的陰極研究實驗方法,本論文論證了建立與aes相連的pld裝置的必要性和可行性,並實際建立了這一裝置,實現了陰極的原位沉積、原位分析。電子發射現象是在電子發射體表面發生的物理過程,發射表面是由活性元素構成的動態平衡系統,這一系統直接決定電子發射性能。表面分析手段對陰極研究是必不可少的。分享友人