熱沖擊強度 的英文怎麼說
中文拼音 [rèchōngjīqiángdù]
熱沖擊強度
英文
resistance to thermal shock-
Sicp / al matrix composites, with 5, 15 and 25 % volume fraction of sic particles, were prepared by vacuum hot - pressing sintering processing in this paper. based on mechanics properties, sem observation and energy dispersive x - ray analysis, the interface reaction phenomenon of sicp / al composites made by vacuum hot - pressing sintering, as well as the reinforcement and fracture mechanisms of this composite were analyzed. the dynamic responses of sipc / al composites were studied by a split hopkinson high - speed pressure bar impact system which strain rate was from quasistatic state strain rate ( 3. 3 10 - 3s - 1 ) to dynamic state strain rate ( 5. 2 103 s - 1 )
本研究以武裝直升飛機防護裝甲材料為研究對象,採用真空熱壓粉末冶金燒結工藝制備了含sic顆粒體積分數分別為5 、 15和25的sic顆粒增強鋁基復合材料,結合其力學性能、掃描電鏡和界面微區能譜分析結果,分析了sic _ p al復合材料的真空燒結過程中的界面現象,以及材料增強和斷裂機理,並利用hopkinson高速壓桿沖擊實驗系統對其從靜態到動態(應變率為3 . 3 10 ~ ( - 3 ) s ~ ( - 1 ) 5 . 2 10 ~ 3s ~ ( - 1 ) )的壓縮破壞響應進行了研究,分析了不同體積分數sic _ p al復合材料高應變率壓縮載荷下,材料的變形和微觀損傷機理,以及利用高速沖擊空氣炮測定了改復合材料制備剃度復合板的穿透性能。Complete cubic octahedral crystal crystal shape, high strength and thermal stability. having wide cutting range. suitable for high - power saws and geological broach
具有完整的立方八面體晶形,高強度和熱穩定性。在高沖擊條件下,具有較高的鋸切范圍。適用於大功率鋸切,優質鉆頭。Znd2180 complete crystal shape, perfect cubic octahedron, good diaphaneity, high impact strength and thermal stability, suitable for high grade cutting, drilling, and grinding tools
Znd2180晶體完整,具有完整的立方八面體,透明度好,高的抗沖擊強度和熱穩定性。適用於高檔次切割工具、鉆頭、碾磨工具。The studies indicate that different content of pyrophyllite and dolomite can cause the following three cases : ( 1 ) making the refractory point decrease linearly and, to some extent, influencing the microstructure and properties of sintered body ; ( 2 ) acceleratingmullite formation during sintering, reducing thermal expansion coefficient of bond, reinforcing the matching nature and improving the flexural strength and shock strength ; ( 3 ) preventing sic grinding tool from generating black core, expanding suitable sintering temperature range of sic grinding tool
同時,也不同程度地影響了磨具燒結體的微觀結構和性能; ( 2 )可促進在燒結過程中莫來石的形成,降低結合劑的熱膨脹系數,加強了結合劑與磨料的匹配性,提高了磨具的抗折強度和抗沖擊強度; ( 3 )在一定溫度范圍內還可防止碳化硅磨具出現黑心現象,拓寬了碳化硅磨具的燒結溫度適應范圍。Experiments show the optimum content of pyrophyllite and dolomite is 30 % ; in contrast to original bond, the refractory point of bond is reduced by 55, the average coefficient of thermal expansion is reduced by 30 % and flexural strength and shock strength of grinding tool are increased by 27 % and 22 % respectively
通過實驗發現:葉蠟石和白雲石最佳含量為30 % ,與原結合劑相比,結合劑耐火度降低了55 ,平均熱膨脹系數降低了30 % ,磨具抗折強度提高了27 % ,磨具抗沖擊強度提高了22 % 。Complete crystal shape, good diaphaneity, high compact strength and thermal stability. suitable for cutting, drilling and grinding tools
晶體完整,透明度好,具有高的抗沖擊強度和熱穩定性。適用於高檔次切割工具、鉆頭、碾磨工具。Fgm has many superior properties such as eliminating interface crack between the two materials, reducing the thermal and residual stress, thermal barrier, thermal shock resistance, anti - corrosion, increasing the bonding strength and toughness, high - temperature strength ( to 2000 c ) etc., as compared with traditional composite materials
它較目前廣泛使用的隔熱性耐熱復合材料有許多優點,如可以消除材料間的界面,緩和熱應力,具有較高的機械強度,抗熱沖擊性和耐高溫性(達2000 )等。Compared with pure pmma, the thermal and mechanical properties of the nanocomposites are obviously improved at a very small amount of mmt ( ommt ) loading. the tgs of the composites via different methods are improved by 10 ~ 26 ?, the decomposition temperatures at weight loss of 5wt % are increased by 42 ~ 99 ?. in the bulk system, tensile strength, tensile modulus and impact strength are improved by 32. 2 %, 60. 3 % and 68. 6 %, respectively, without the loss of light transmittance
相對于純pmma體系,懸浮法、乳液法及本體法復合材料的t _ g值提高了10 26 ;后兩種復合材料熱失重5wt的溫度提高了42 99 ;而本體法復合材料的拉伸強度、拉伸模量及沖擊強度值最大分別提高了32 . 2 、 60 . 3和68 . 6 ,而透光性能基本未受影響。Test results show that that the breakcown voltage and heat distortion temperature the encapsulating materials of epoxy resin with hgh are famously improved, but the the addition of hgh, the viscosities of the epoxy resin - hgh system is higher compared with that of the others and the encapsulating process is effected. nano - sio2 improves the mechanical properties of encapsulating materials of epoxy resin, impact strength reaches 27. 64kj / m2 from 13. 95 kj / m2, flexural strength reaches 136. 68mpa from64. 95 mpa. by addition of the montmorillonite, glass transition temperature and heat distortion temperature of the encapsulating materials are 13. 2 and 16 higher than that of epoxy re
結果表明,活性硅微粉對環氧灌封材料的熱變形溫度和電學性能提高較為顯著,尤其在浸水后,電學性能降低幅度很小,西北工業大學碩士學位論文但活性硅微粉用量較大,材料的工藝性能明顯降低;納米5102對環氧灌封材料具有顯著的增強和增韌作用,沖擊強度、彎曲強度由原來的13 . 95kj / mz和64 . 95mpa分別提高到27 . 64kjzm2和136 . 68mpa 。The experiment results show that the samples can not be sintered when the addition phases were in a very low level, and their strength and thermal shock resistance performance were neither, there were too much liquid phase created when the addition phases were in a high level, it can decrease the pore rate of the samples, and the space for structure adjusting during thermal shock, resulting in the decrease of their thermal shock resistance performance
實驗發現,當外加劑含量較少時,樣品的燒結程度低,強度不理想,抗熱震性能不好。外加劑含量過多則生成過多的液相,使樣品的氣孔率大大減小,減少了材料在熱沖擊過程中的結構調整空間,從而降低了材料的抗熱震性能。The composites with different compatibilizers and nano - sio2 content were characterized by means of mechanical testing, differential scanning calorimetry ( dsc ), x - ray diffraction ( xrd ), fourier transformation infra - red spectroscopy ( ft - ir ), transmission electron microscope ( tem ), scanning electron microscope ( sem ), etc. the relation between the structure and property of the composites was discussed in this thesis
研究了不同增容劑、納米sio _ 2含量對復合材料的沖擊強度、拉伸強度等力學性能;並利用差熱掃描量熱分析( dsc ) 、 x射線衍射譜( xrd ) 、紅外吸收光譜( ir ) 、掃描電鏡( sem )等分析,討論了復合材料結構與性能的關系。Second, many mechanical properties are tested, for example, tensile strength and tensile modulus, flexural strength and flextural modulus and impact strength. by the analysis of the tensile stress - strain curves and the flexural stress - strain curves, the results are as follows : 1 ) the voluminal content of fibre of composite making by vacuum assistant resin injection is more than other composites. 2 ) the mechanical properties of the needlepunching nonwoven fabric reinforced polymer composite are superior to these of the calendering nonwoven fabric reinforced polymer composite
首先,採用不同的增強材料(針刺非織造布和熱軋非織造布) 、不同的基體材料( 961樹脂和306樹脂)和不同的成型工藝方法(手糊法、真空袋法和真空輔助成型法)製造出了一系列非織造布增強復合材料,然後對它們的拉伸強度、拉仲彈性模量、彎曲強度、彎曲彈性模量和沖擊強度等力學性能進行了測試,並分析了它們的拉伸載荷? ?位移曲線和彎曲載荷? ?位移曲線,結果表明真空輔助成型工藝能大大提高纖維的體積含量;針刺非織造布增強復合材料各項力學性能優于熱軋非織造布增強復合材料。Based on the characteristics of silicon whisker, the research on the modification of pa6 by silicon whisker sio2 - jx was made, and the result showed that the tensile strength, impact strength, brinell hardness, and heat resistance increased with the increase of the content of the whisker ; sio2 - jx could replace short glass fiber in the modification of pa6, improving the heat distortion temperature, removing the appearance of glass fiber, reducing shrinkage and the cost
摘要利用晶須矽纖維狀的特性,對其填充于龍玻纖改性進行研究,結果表明,隨晶須用量的增加,材料的拉伸強度、沖擊強度,布氏硬度、耐熱溫度均得到提高;晶須矽可取代短玻纖使用,提高熱變形溫度、消除玻纖外露,降低收縮率及生產成本等。The crystal is applied to the papermaking that can raise whiteness and non - transparency, remains - proportion of the crystal is higher than the usual light calcium carbonate. as for plastics, it can improve impact strength in the plastics, its inhibiting - burning capability is advancing bigger than the common inhibiting - burning material of magnesium hydroxide. concerning the thermo tropic adhesives, the physical property of compound - packing is higher than the one of single - packing, namely remover strength, softening point, hardness, climate tolerance and the speed of consolidation are high
晶須作為造紙填料,可使紙張的白度和不透明度提高,留著率比造紙常用填料輕質碳酸鈣高;用作塑料填料,可使塑料的沖擊強度提高,阻燃性能比常用阻燃材料氫氧化鎂有較大的提高;添加到熱熔型膠粘劑中,與輕質碳酸鈣混合使用可明顯提高熱熔膠的剝離強度、軟化點、硬度、耐侯性以及固化速度。Body and bonnet : austenitic stainless steel castings used for bodies and bonnets offer excellent impact strength, minimal heat loss and protection against corrosion
閥體和閥帽:閥體和閥帽採用奧氏體不銹鋼鑄件,具有優異的抗沖擊強度,極小的熱損失和優異的耐腐性。The pvc insulated nylon sheathed wire has advantages with excellent thermal stability, larger machanical strength and surface strength, anti - thermal - distortion, better bending strength and impulse strength, abrasion resistance and chemical - resistance and self - lubrication as well as better machine - oil - resistance and gas - proof
尼龍護套pvc絕緣電線具有優良的熱穩定性、較高的機械強度、表面強度、耐熱變形性、抗彎強度、沖擊強度、耐磨性、耐耐化學性和自潤滑性, 2 、更具有耐機油、耐汽油性。When matter is impacted by shock compression with hundreds pa, its temperature may be thousands karat, even it may be ten thousand karat, and there is strong spectrum to radiate at the same time. this radiation is mainly made from the thermal radiation of matter, and radiating transition of atoms and molecules of matter
在數百吉帕的瞬態強沖擊波作用下,材料的沖擊溫度可上升至幾千開,甚至上萬開,同時伴隨著強烈的輻射,這種輻射主要來源於材料的熱輻射,以及材料的構成原子、分子的輻射躍遷。The hydroxyl - terminated and carboxyl - terminated pu - prepolymer were prepared and cured respectively with pf. the molecule structures of two composite systems were characterized by means of ft - ir, and cured - sample morphologies were analyzed by sem. by means of the measurement of properties of pf, impact strength, volume shrinkage and thermal stability of pf / pu composite, effect of pu on pf has been investigated and the toughening differentials have been compared, then two kinds of toughening mechanisms have been discussed
文中利用紅外光譜對pf / pu共混物的分子結構進行了定性分析,利用掃描電鏡對共混物沖擊斷面形貌進行了表徵、用簡支梁沖擊試驗機按國標測試pf / pu共混物的沖擊強度,並按國標測試共混物體積收縮率,最後利用熱重分析對pf / pu共混物的熱穩定性進行測試。Finite element analysis on cylindrical pressure vessel with hillside nozzles
承壓熱沖擊對核壓力容器強度的影響As the time microscale factor in fast transient high - strength heating or cooling can not been ignored, heat relaxation time is introduced. based on hyperbolic heat conduction equation and kinetic equation added inertia, theoretical analysis and study of stress diffusion and transformation in heat impact process were developed
考慮到快速高強度加熱或冷卻帶來的時間微尺度因素,引進熱鬆弛時間,以雙曲線型熱傳導方程和考慮慣性力的運動方程為基礎,對熱沖擊過程的應力傳播與變化規律進行了理論上的分析和研究。分享友人