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silicon powders
相关语句
  硅粉
     Nanosized Silicon Powders Produced by CO_2 Laser induced Chemical Vapor Deposition
     CO_2激光CVD制备纳米硅粉
短句来源
     High quality α-Si_3N_4 powders can be made quickly by selectingoptimum conditions of nitriding silicon powders.
     硅粉快速氮化时,存在一个临界氮气压力,临界压力大小与硅粉本身表面特性有关,采用适当的工艺参数可快速制备高质量的α-SiN_4粉末。
短句来源
     The resultsshow that silicon nitride powders can be synthesized by quickly nitriding siliconpowders in the temperature range 1250-1370℃,for 1h,but its crystalline phasemainly consists of β-Si_3N_4·There is a critical pressure existing for the nitridingof silicon powders,and its value depends on the surface characteristics of thesilicon powders.
     实验表明:在1250~1370℃1h 内硅粉可快速氮化反应生成氮化硅,主要晶相为β-Si_3N_4。
短句来源
     FRACTAL STRUCTURE IN THE LASER SYNTHESIS OF SILICON POWDERS
     激光合成硅粉中的分形结构
短句来源
     The nitriding process of this experiment selected a reaction time of 10 hours at 1350 C, together with Fe and Fe + Al elements as additives. Only this is benefit to the nitridation of silicon powders.
     实验氮化工艺控制在1350℃下连续氮化10小时,以Fe和Fe+Al为添加剂,这对硅粉氮化有利。
短句来源
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  “silicon powders”译为未确定词的双语例句
     In-situ Ti_5Si_3/ Ti_3Al/TiAl composite coatings reinforced by high hardness Ti_5Si_3 intermetallic phase were fabricated on γ-TiAl substrates precoated with silicon powders by means of electron beam surface alloying.
     通过使用高能量密度的电子束高速扫描预先涂有Si粉的TiAl合金表面,"原位"制得了以高硬度金属间化合物Ti5Si3为增强相、以TiAl、Ti3Al为基体的复相合金表面改性层。
短句来源
     Research on the Application of Silicon Powders in Bricks or Stones Structure
     硅灰在砌体结构中的应用研究
短句来源
     Through the research and analysis of application of silicon powders in bricks and stones structure, the structure can be reinforced in its entirety by blending the silicon powders and the strength of the structure is also improved.
     通过硅灰在砌体结构中的应用研究分析可知,硅灰的掺入能提高砌体结构的整体性,从而达到提高其整体强度。
短句来源
     To resolve the chemical compatibility between carbon nanotubes (CNTs) and Si3N4, the CNTs/Si3N4 ceramic matrix composites were prepared by the reaction-bonded processing at a lower sintering temperature with silicon powders as the starting materials. The phase compositions, chemical compatibility,mechanical properties,and electromagnetic properties of the composites were investigated by XRD,SEM,TEM,and scalar analyzer, respectively.
     为改善碳纳米管(CNTs)与氮化硅(Si3N4)陶瓷间的化学相容性,以金属 Si粉为主要原料,通过反应烧结工艺在相对较低的烧结温度制备了具有良好相容性的CNTs/Si3N4陶瓷基复合材料,借助XRD、SEM、FEM、标量分析仪等分析测试手段,着重研究了反应烧结CNTs/Si3N4复合材料的物相组成、化学相容性、力学性能及电磁性能。
     The results showed that a dense MoSi2 SiC p composite can not be made directly from the molybdenum and silicon powders reacted with carbon powder, but from the alloyed MoSi2 powder reacted with silicon and carbon powders.
     结果表明:直接采用元素粉Mo,Si与Si,C粉或SiC粉反应,较难制得致密的MoSi2-SiCp复相材料;
短句来源
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  相似匹配句对
     Nitriding of Silicon Powders in High Pressure
     硅粉在高氮压下氮化的研究
短句来源
     FRACTAL STRUCTURE IN THE LASER SYNTHESIS OF SILICON POWDERS
     激光合成硅粉中的分形结构
短句来源
     SILICON POWDERCONCRETE
     硅粉混凝土
短句来源
     Silicon Photonics
     硅光子学
短句来源
     Warm Froging of Powders
     粉末温锻
短句来源
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  silicon powders
On nitrogen sorption during high energy milling of silicon powders in ammonia and nitrogen
      
A technology providing highly porous silicon nitride materials that is based on shaping preliminarily fabricated pieces of thermoplastic slip makes it possible to use initial silicon powders of different dispersities.
      
A study was made of the reaction of zirconium carbide and silicon powders over the temperature range 800-1700?C.
      
Reaction between zirconium carbide and silicon powders
      
Characterization of silicon carbide and silicon powders by XPS and zeta potential measurement
      
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Experiments were carried out with the purpose of shortening the reducingperiod in small basic electric furnace for carbon steels of various carbon content.In some of the experimental heats reducing period was shortened by 20 mi-nutes and the others were made according to the normal procedure of the works.For some of the low carbon steel heats,the amount of ferro-silicon powder wasincreased by 20% and added in advance.The results,obtained from heats of shorterreducing period,show that the deoxidation and...

Experiments were carried out with the purpose of shortening the reducingperiod in small basic electric furnace for carbon steels of various carbon content.In some of the experimental heats reducing period was shortened by 20 mi-nutes and the others were made according to the normal procedure of the works.For some of the low carbon steel heats,the amount of ferro-silicon powder wasincreased by 20% and added in advance.The results,obtained from heats of shorterreducing period,show that the deoxidation and desulphurization appear to be ascomplete as that of a normal heat,the content of nitrogen and non-metallic in-clusions being much less.In addition,the results on mechanical properties showthat in the case of medium carbon steel,the impact value is higher,and in thecase of low carbon steel the percentage of elongation and the rate of reductionof area are also slightly superior although the yield strength becomes somewhatlower.Such a shortening of reducing period also results in a 7% increase ofthe rate of production.It is suggested that in electric steel smelting process theappropriate deoxidation procedure and the length of reducing period should varyin accordance with different carbon content of the steel.A relationship of[S]/[O]=1.2—2.2 at the end of reducing period was ob-served,and the possibility of further shortening of the reducing period in makingmedium and high carbon steel was also pointed out.

在装料量为8吨的小型电炉上进行了冶炼各种碳钢的缩短还原期的研究。还原期缩短到70分钟(低碳钢冶炼中还增加矽铁粉加入量和提早加入时间)的结果是:脱氧、脱硫符合要求,钢中非金属夹杂物和氮的含量显著减少,并提高炉子生产率约7%。从而指出了以电炉冶炼碳钢时还原期的时间和脱氧制度应按钢中碳含量的不同而有所区别。并指出中、高碳钢冶炼中还原期缩短到50分钟左右的可能性。此外还观察到还原期末[S]/[O]=1.2—2.2的关系。

The lattice constant of silicon powder of high purity is measured with the conventional X-ray powder diffractometer. Both "single scan" method and the method of determining the peak position are used (without recourse to internal standard). The aim is to enhance the precision and accuracy of measurement. All errors are taken into consideration. On the basis of the analysis of the errors due to the displacement of the focal spot, the requirement for aligment are presented and the error is eliminated...

The lattice constant of silicon powder of high purity is measured with the conventional X-ray powder diffractometer. Both "single scan" method and the method of determining the peak position are used (without recourse to internal standard). The aim is to enhance the precision and accuracy of measurement. All errors are taken into consideration. On the basis of the analysis of the errors due to the displacement of the focal spot, the requirement for aligment are presented and the error is eliminated experimentally. The geometrical aberration due to vertical divergence is determined experimentally and so the problem of the correction of this kind of error is solved. Based on the experimental data the Lorentz physical aberration, and the like, associated with the method of determining the peak position are corrected. The standard deviation of the measured lattice constants in a number of experiments is 3 part in 106. The results obtained with the characteristic radiation of different targets have shown to agree well. Due to the correction of the above errors, the accuracy is enhanced significantly and the discrepancy between the values of lattice constants measured with monocrystals and polycrystals is eliminated respectively. The results have shown that the lattice constant of the well crystallized specimen of high crystal symmetry can be determined by "single scan" method and peak position method with conventional diffractometer with a precision and accuracy of 4 part in 106.

以普通粉末衍射仪用单边法并峰值定位法(不借助内标)测定高纯硅粉的点阵常数,目的是提高测定的精确度和准确度。考虑了各种误差。对焦点偏移误差进行了分析、确定了准直的要求并以实验方法消除了此误差。用实验方法测定了衍射峰位的垂直发散几何偏差从而解决了此误差的校正问题。对峰值法的Lorentz等物理偏差进行了以实验数据为根据的校核。多次点阵常数测定值的标准误差仅为百万分之三,达到了高精确度。用不同靶的特征谱线对这一结果进行了验证,结果良好。因解决了上述误差的校正问题,准确度也达到相应水平,因而解决了单晶法与多晶法测定硅点阵常数不符的问题。分析及实验数据说明用普通衍射仪并单边峰值定位法测定结晶良好的高对称晶系样品的点阵常数,其精确度和准确度可达百万分之四。

Reaction sintered Si_3N_4-SiC has been studied with silicon and carbon powder as start-ing materials. Some physical properties and high temperature strength of the specimens ha-ve been determined.Thick specimens prepared with such materials may be nitrided morecompletely than those with silicon powder alone. X-ray powder diffraction analysis showsthat reaction sintering Si_3N_4-SiC consists of a large portion of α-Si_3N_4 With β-Si_3N_4 andβ-SiC in minor amounts. The role of carbon has...

Reaction sintered Si_3N_4-SiC has been studied with silicon and carbon powder as start-ing materials. Some physical properties and high temperature strength of the specimens ha-ve been determined.Thick specimens prepared with such materials may be nitrided morecompletely than those with silicon powder alone. X-ray powder diffraction analysis showsthat reaction sintering Si_3N_4-SiC consists of a large portion of α-Si_3N_4 With β-Si_3N_4 andβ-SiC in minor amounts. The role of carbon has been preliminarily discussed.

以Si+C作为原料,研究了反应烧结氮化硅-碳化硅,测量了一些物理性能和高温强度。这种材料与反应烧结氮化硅相比,能使尺寸较厚的制品氮化完全。X射线分析指出,这种材料是由大量的α-Si_3N_4和少量β-Si_3N_4、β-SiC组成。对碳的作用进行了初步讨论。

 
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