This dissertation focuses on how to develop a high performance damping mechanism based on multi - energy transitions, which is independent or little dependant with the viscoelasticity of polymer matrix. three sections are mainly included in this dissertation as follows : chlorinated polyethylene ( cpe ) / piezoelectric ceramic ( pzt ) / vapor grown carbon fiber ( vgcf ) composites ; cpe / 2, 2 ' - methylene - bis - ( 4 - methyl - 6 - cyclohexylphenol ) ( zkf ) / vgcf composites ; organic hybrids made from cpe and small molecules cpe / pzt / vgcf composites : the damping composites of multi - energy transitions mechanism were produced by mixing pzt and vgcf into cpe. in this system, the mechanical vibration energy that was transmitted to cpe was found to convert into joule ' s heat through conduction paths between vgcf in the polymer matrix, so the vibration fades away
本論文主要包括三個方面的研究內容: ?氯化聚乙烯( cpe ) /壓電陶
瓷( pzt ) /氣相生長碳纖維( vgcf )復合材料; ? cpe /雙[ ( 2 -羥
基- 3 -環己
基- 5 -甲
基) -苯
基]甲烷( zkf ) / vgcf復合材料; ? cpe
基有機小分子混雜型復合材料cpe / pzt / vgcf減振復合材料:利用壓電和導電填料填充高聚物
基體,當復合材料受到機械振動時,通過高聚物
基體將機械振動能傳遞到壓電陶
瓷粒子上,利用壓電陶
瓷的壓電效應,將機械能轉換成電能,則電流在導電粒子產生的迴路中流動,由於導電迴路具有一定的電阻,所以電能又轉變成熱能耗散掉,從而起到減振的目的。
Our products include glass substrates for lcd flat panel televisions, computer monitors and laptops ; ceramic substrates and filters for mobile emission control systems ; optical fiber, cable, hardware & equipment for telephone and internet communication networks ; optical biosensors for drug discovery ; and other advanced optics and specialty glass solutions for a number of industries including semiconductor, aerospace, defense, astronomy and metrology
我們的產品包括用於lcd平板電視、電腦顯示器和筆記本電腦的玻璃
基板;用於移動排放控制系統的陶
瓷載
體和過濾器;用於電話和互聯通訊網路的光纖、光纜、以及硬
體和設備;用於藥物開發的光學生物傳感器;以及用於其它一些行業,例如半導
體、航空、國防、天文學和計量學的先進的光學和特殊玻璃解決方案。
Mainly for capacitance, semiconductor, jingzhen, resistance, ic chips, jiechajian procedures, connecting pieces, switching devices, silicon, triode, diode, piezoelectric ceramic base films, tubes, electron tubes, electronic stamping, precision metal parts, production processes between cleansing processes
晶元接插件連接件轉接器矽片三極
體二極
體壓電陶
瓷基片顯象管電真空器件等內精密電子沖壓五金零件,生產加工過程工序間的清洗。
Determination of thermal diffusivity of continuous fiber - reinforced ceramic matrix composites by the laser flash method
用激光閃爍法測定連續纖維增強陶
瓷基體復合物的熱擴散性
When the stress at the tip of crack is inflicted on the m - type ferrite particle dispersed in matrix as a second particle, not only the toughness of composites will be pro ved because of the non - elastic area produced by the particle but also the strength change of magnetic field and the stress distribution in the structural ceramics will be detected by the strength of spontaneous magnetization varying while magnetic materials being pressed or drawn
這是因為當結構陶
瓷中裂紋尖端的應力作用在彌散於
基體內的鐵磁
體二相粒子上時,鐵磁粒子不僅在裂紋尖端周圍產生的非彈性區域使復合材料的韌性提高;而且還能利用鐵磁材料在外應力作用下自發磁化強度發生變化的性質,通過測量復合材料在應力作用下磁場強度的變化,探測出結構陶
瓷中的應力分佈情況。
In this paper, the characteristics of the electroless nickel plating, the composition and fuction of the plating solution were introduced. at this base the low emissivity material was successfully prepared by the electroless plating method. the sample detected by edxa, sem, aes, ifr
本文在系統介紹了化學鍍鎳工藝的特點、溶液組成及各組份的作用的
基礎上,採用化學鍍方法制備低發射率材料,成功地在羰
基鐵粉
體和陶
瓷粉
體上實施了化學鍍鎳。
Product structure : by the ceramic substrate, the back electrode, the resistance body, the surface electrode, glass, two glass, the end electrode, the intermediate electrode, the outer electrode equicomponent constitutes
產品構造:由陶
瓷基片、背電極、電阻
體、面電極、一次玻璃、二次玻璃、端電極、中間電極、外部電極等成分構成。
Cmc is in the experimental stage in our country, and the systematical evaluation system has not been developed
陶
瓷基復合材料在我國還屬于試驗研究階段,尚未形成完整的材料評價
體系。
The phase composition, microstructure and the interface characteristic were all analyzed through xrd, sem, optical microscope, eds, etc. the results are listed as follows : the growth mechanism of al - 5zn - 10si alloy is that molten aluminum keep a continuous oxidation and growth in the way of cell - shape through the micro - channels which transfer the molten aluminum to the reaction front
採用xrd 、 sem和光學顯微鏡以及能譜分析法,研究分析了al _ 2o _ 3 sic ni al - si合金多相陶
瓷基復合材料的相組成及其界面特徵。研究發現: al - 5zn - 10si合金原位氧化生長是合金熔
體通過氧化
體中的微觀通道傳輸到氧化生長
體前沿繼續氧化,並以胞狀形式向前生長。
As a result, the young ' s modulus of the composites decreased a little during the heating process, which indicated that ceramics were thermal stable. on the other hand, it decreased from ~ 280gpa to ~ 220gpa as ni - fe content was increased from 0 to 19vol. %. this is reasonable considering that the young ' s modulus of ni - fe is much lower than the matrix
結果顯示,材料的楊氏模量隨溫度的升高而不斷減小,但減小的幅度很小,表明陶
瓷材料穩定性很好;不同復合材料的楊氏模量隨ni - fe含量增加自280gpa減小到220gpa ,這應該是因為ni - fe合金的楊氏模量比
基體氧化鋁的要小的緣故。
Focusing on serious damage of carbon fibers in ceramic matrix composites ( cmcs ) prepared by precursor infiltration pyrolysis ( pip ), and with emphasis on carbon fiber reinforced silicon carbide composites ( cf / sic ) derived from polycarbosilane ( pcs ), the influences of raw materials ( including carbon fibers and precursors, etc. ) and preparing conditions on carbon fiber damage during the preparation of cf / sic composites were investigated systemically. pyrolysis process, fiber - matrix interface and carbon fiber damage process were observed by sem, tem, ir, xrd, xps and tq etc. the characterization method of carbon fiber damage degree was established and the models for carbon fiber damage mechanism were also established. the carbon fiber coatings and unidirectional cf / sic composites with coated carbon fibers were prepared and studied
本文針對先驅
體浸漬裂解工藝制備陶
瓷基復合材料過程中碳纖維損傷嚴重的問題,以聚碳硅烷( pcs )制備cf / sic復合材料為重點,採用sem 、 tem 、 ir 、 xrd 、 xps 、 tg等表徵手段,分析了先驅
體裂解過程、纖維
基體界面和碳纖維損傷過程,系統地研究了原料(碳纖維、先驅
體等)和制備工藝條件等在cf / sic復合材料制備過程中對碳纖維損傷的影響,建立了碳纖維損傷程度的表徵方法和損傷機理模型,制備了纖維表面塗層並利用塗層碳纖維制備了單向cf / sic復合材料。
Due to their unique optical, electrical properties and potential applications based on quantum size effect, small size effect and interface effect, cermet films consisting of ceramic matrix and embedded metal nanoparticles are attracting increasing attention for both fundamental and practical reasons
作為一類新型的功能薄膜材料,由納米金屬微粒鑲嵌于陶
瓷基體中所構成的金屬陶
瓷薄膜,由於量子尺寸效應、小尺寸效應、界面效應而具有獨特的光電特性和良好的應用前景,正在引起材料學界的極大關注。
The effect of zirconia content and sintering temperature on properties of zirconia toughened glass infiltrated nanometer - ceramic composite matrix al2o3 nzro
燒結溫度與氧化鋯含量對氧化鋯增韌納米復合陶
瓷基體強度影響的比較研究
This paper describes ceramic fiber reinforcements and the manufacturing, engineering properties and potential industry applications of continuous filer reinforced ceramic composites
摘要本文介紹陶瓷纖維增強材料、陶瓷纖維增強陶瓷基體復合材料的製法和性能及其潛在的工業應用。