pressureless 中文意思是什麼

pressureless 解釋
無壓的
  1. The problems can be addressed, in part, through a strongly reactive alloying addition, such as mg, li and so on, and through reinforcement coating. in this paper sicp / al composites and sicp / al - si composites fabricated by the pressureless infiltration method. in order to found out the influence the different quantity of the reactive alloying addition mg si ce on the wetting between sicp and molten metal as well as the properties of mmcs, the behaviors of molten metal, the mechanical properties, micro - structure and the interfacial reactions was investigated respectively

    本文通過研究制備sicp al復合材料、 sicp al - si復合材料的過程中，熔融鋁液或鋁硅合金液的浸滲行為、 sic - al 、 sic - al - si之間的界面反應、復合材料的機械性能、微觀結構等，探討了不同量的活性元素mg 、 si 、 ce對sic顆粒與熔融基體之間的潤濕性及復合材料性能的影響。
  2. The system of vpi equipment mainly includes vacuum chamber, heating unit, worktable with its drive unit, vacuum pumping unit, gas - charge unit and control unit, etc. this equipment would meet the need of al or cu matrix composites prepared by pressureless infiltration or vacuum infiltration in a high vacuum or special atmosphere

    該設備主要出密封罐、加熱系統、升降工作臺、真空系統、充氣系統、控制系統及密封罐水冷系統等組成。可以實現常見金屬基復合材料在較高真空或特定氣氛下的無壓浸滲或真空浸滲制備工藝，並可實現試樣的不同冷卻方式凝固。
  3. The pressureless infiltration technique means that the spontaneous infiltration of the refined molten al or al - si alloy into the power bed, contains the filler reinforcement particle and k2tip4, occurred at 900 to fabricate sicp / al or sicp / al - si composites, without the aid of any externally applied pressure or vacuum, only by its gravity

    無壓自浸滲法是指在不藉助任何外力作用下，把熔煉好的鋁液，經精煉，調溫后，澆入經過預熱，含有增強體顆粒與助滲劑的混合體粉末中。
  4. Relationship of the mechanical properties and the density of pressureless sintered a phase silicon carbide

    常壓燒結碳化硅陶瓷的力學性能與質密度
  5. Pressureless discharge of rinsing water to water drain

    洗水無壓排放到廢水排放管道。
  6. The influence of nano - al2o3 on the sintering and the properties of the si3n4 ceramics was researched in this paper. the samples with different amount of nano - al2o3 were obtained by using pressureless sintering at 1600, 1650, 1700 in the nitrogen atmosphere. the microstructure and the composition of the ceramics were determined by the means of x - ray, sem, micro - hardness meter etc. it is show that the sisty ceramics can be densified at 1650c to % percent of the theory density through the addition of nano - al2o3 ( the value could be 90 percent by other technique ). the crystalline growth of the cylindrical - si3n4 and the ratio of its longitude to its diameter are increased with the addition of nano - al2o3. a uniform microstructure and an fined crystal as well as more sialon phases can be obtained in the si3n4 ceramics through the addition of that

    實驗結果表明：在碳管爐中、氮氣保護下進行燒結，添加劑為納米al _ 2o _ 3粉末時，由於納米粉末的高活性、高燒結驅動力，在1650就可使si _ 3n _ 4完全地燒結，並使其緻密度可達理論密度的96以上（比其它工藝高6左右） ；同時，納米al _ 2o _ 3地加入大大促進了長柱狀? si _ 3n _ 4的生長和發育及柱狀晶長徑比的提高，使微觀結構均勻、細化，形成了更多力學性能優異的固體? sialon相，減少了不利於陶瓷材料性能的晶間玻璃相，凈化了晶界。
  7. The influence of the infiltration temperature, the infiltration atmosphere and different kinds of aluminum alloys are investigated. the researches indicate that during the pressureless infiltration process, the atmosphere and temperature are necessary conditions

    對無壓浸滲法制備b _ 4c al復合材料工藝過程中的溫度、氣氛、浸滲金屬的研究表明：氣氛、溫度是無壓浸滲發生的重要影響因素。
  8. Casting of surface composite with a pressureless permeating method

    無壓滲透法制備鑄造表面復合材料
  9. Pressureless infiltration ( pli ), developed in recent years, is an available method to produce metal matrix composites ( mmcs ), and it is characterized by simplified process and low costs

    無壓浸滲技術是一種新發展起來的金屬基復合材料制備方法，具有工藝簡單、成本低廉等特點。
  10. In this paper, finite element software ansys is used to simulate the thermal conductivity and pressureless infiltration technique is used to produce aluminum infiltrated silicon carbide composite with high volume fraction of sic. the influence of interfacial thickness and temperature on thermal conductivity and cte have been investigated and analysed

    本文採用有限元軟體ansys對鋁滲碳化硅復合材料的有效熱導率進行了數值模擬，用無壓浸滲法制備了高體積分數的鋁滲碳化硅復合材料，研究了界面層厚度和溫度等對鋁滲碳化硅復合材料的熱導率和熱膨脹系數的影響，並進行了分析。
  11. In this thesis, fabricating boron carbide and aluminum ceramic - metal composites by pressureless infiltration technology, heat treatment of boron carbide and aluminum composites and their influence on the mechanical properties of the composites have been investigated. the microstructure of the material, its interface and their relationship with the properties are also been investigated

    本文主要研究了無壓浸滲制備b _ 4c al復合材料工藝、 b _ 4c al復合材料熱處理工藝，以及材料制備工藝對材料性能的影響，並利用x射線光電子能譜分析、 x射線衍射分析、掃描電鏡以及透射電鏡等手段較深入分析了材料顯微組織和界面，探討了b _ 4c al復合材料的微觀組織、界面與性能的關系。
  12. Ssic silicon carbide pressureless - sintered

    不加壓燒結碳化硅
  13. A kind of vacuum pressureless infiltration equipment ( vpi ) was designed and made by selves

    自行設計並研製了一臺真空無壓浸滲設備。
  14. Current status of aluminium matrix composites by pressureless infiltration technique

    無壓滲透法制備鋁基復合材料的研究現狀
  15. Effect of phase transformation and grain size on pressureless sintering behavior for tio2 ceramics

    相變和晶粒尺寸對二氧化鈦陶瓷無壓燒結行為的影響
  16. During the pressureless infiltration process, the atmosphere and temperature are necessary conditions

    然後研究了無壓浸滲工藝對復合材料組織、結構和性能的影響。
  17. In this thesis, tic / nisal composites have been prepared by the pressureless infiltration technique, and its influences on the mechanical properties of the composites have been investigated

    高溫下ni _ 3al熔體自發浸滲tic粉體預制體后，形成tic顆粒增強ni _ 3al基體，具有雙相雙連結構的tic ni _ 3al復合材料。
  18. The experimental results reveal that mg and n2 are necessary for pressureless infiltration, and the heat rate is critical condition for producing big samples. infiltration is sensitive to environmental atmorspher, impurities and oxide shells of al powders

    結果表明， mg和n _ 2對滲透的順利進行是必需的，滲透時的升溫速度對于較大樣品的制備很關鍵，滲透過程對環境、雜質、氧化層的影響很敏感。
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