Electron theory analysis of alloying elements impoverishment in 12cr1mov 固溶體中貧化的電子理論分析
Electron theory studies on structure andproperties for tib2 and zrb2 phases 2晶體結(jié)構(gòu)與性能的電子理論研究
Collective electron theory 集體電子理論
Study on valence electron theory of phase relationship in a m transformation 奧氏體向馬氏體轉(zhuǎn)變時位向關(guān)系的價電子理論研究
By employing one - dimension planar gap model , the physical mechanism of rtto is studied by single electron theory approximately 采用一維平板間隙模型,運用單電子理論分析了rtto的工作機制。
Design the configuration parameter of the electromagnets using magnetic circuit theory , and check the temperature increase of the electromagnet . and design a power device using igbt with electric and electron theory . it can supply the electromagnets excitation current which changes regularly on a given rule 對于彎扭矩檢測系統(tǒng),運用應(yīng)變儀的原理,在試件上的合適位置加貼應(yīng)變片并組成惠斯登全橋差動電路,檢測出實際加載在試件上的彎矩和扭矩的大小。
The following results are achieved : ( 1 ) in accordance with the empirical electron theory of solids and molecules , considering the number of covalent bond pairs on the strongest bond in a segregation structure na , the elements for matrix - strengthening can be chosen . ( 2 ) on the basis of the available phase - equilibrium thermodynamics calculation of alloy system and phase diagrams , which have been worked out , the contents of alloy elements can be identified with reference to the types , quantity and phase - transformation of carbides . ( 3 ) both the values relating to toughness ( including bending strength , yield strength , impact value of unnotched samples ) and hardness of new dm9 die steel are higher than those of crl2mov die steel 結(jié)果得出: ( 1 )根據(jù)固體與分子經(jīng)驗電子理論,利用偏聚結(jié)構(gòu)單元的最強共價鍵上的共用電子對數(shù)n _ a ,可以選擇工模具鋼基體相的強化元素; ( 2 )根據(jù)合金系相平衡熱力學計算及已有的相圖,可以碳化物類型、數(shù)量及其相變確定合金元素含量; ( 3 )新型dm9鋼在強韌性(抗彎強度、屈服強度、無缺口沖擊值)和硬度方面均高于cr12mov鋼; ( 4 )以dm9鋼與6crw2si 、 7cr2wmovsi ( dm7 ) 、 h13和cr12mov四種模具鋼的實驗比較,進一步驗證了上述冷作模具鋼合金設(shè)計方案是合適的。
Based on the transferred - electron theory of the iii - v compound semiconductor and the research on the lock - on effect of the si - gaas pcss ' s , this paper proposes the monopole charge domain model similar to the guun or high - field domain to explain the peculiar switching phenomena occurring in the lock - on mode theoretically 本文基于gaas等?族化合物半導體的轉(zhuǎn)移電子理論,結(jié)合半絕緣gaas光電導開關(guān)中特有的lock - on效應(yīng)的研究,提出了類似于耿疇(高場疇或偶極疇)的單極電荷疇理論模型,對光電導開關(guān)lock - on效應(yīng)的各種現(xiàn)象給出了理論解釋。
The influence of a static electric field was investigated systemic in three stratifications : the electron scope of single atom , multi - atom local effect and macro - materials character based on electron theory . the multi - scope effect of electric field on metals and alloys , such as the atomic energy , solute elements , microstructure and precipitates , fracture character , mechanic and physical properties , were studied with the purpose of finding the mechanism and the nature of the electric field 針對目前電場作用研究中的問題,本文以鋁合金為研究對象,分別在三個不同尺度的理論范疇:單原子的電子理論,多原子(原子團簇)的微觀局域效應(yīng),和材料宏、微觀行為,系統(tǒng)的、多層次的研究了電場在電子層次,溶質(zhì)行為,微觀組織,以及宏觀的斷裂特征和性能等多個尺度的電場效應(yīng)。