b4c

Determination of TiAl / B4C Composite Ceramic Sintering Process Parameters

TiAl/B4C复合陶瓷烧结工艺参数的确定

B4C / PP blended fibre is an important neutron shielding composite material .

B4C／PP共混纤维是重要的防中子辐射材料。

The process of electroless Ni - P - B4C plating is determined primarily .

初步确定了Ni-P-B4C镀层的施镀条件。

Rheological behavior of pp / b4c blend system

聚丙烯/碳化硼共混体系的流变性能

The mechanical properties of B4C / Al composite prepared by pressureless infiltration technology were tested .

对无压浸渗法制备的B4C/Al复合材料进行了力学性能测试。

Metal hardness and wear-resistance were increased with the increase of B4C , Fe and graphite .

随着碳化硼、铁粉、石墨增加硬度与耐磨性提高。

Laser ablation test shows that the laser irradiation resistance is improved significantly for stainless steel after being deposited by B4C coating .

激光辐照试验表明，在不锈钢表面沉积B4C涂层，可以明显改善其抗激光辐照性能。

X-ray diffraction analysis results show that the BCx coating consists of B4C and pyrolytic carbon with a high degree of graphitization .

结果表明：产物表面光滑，断面呈细密的片层状结构，产物由B4C和石墨化程度较高的热解碳组成。

In this paper , the Ni-badsed alloy coating and Ni-based alloy / B4C coating have been obtained by laser cladding .

本文采用激光熔覆技术分别在45钢表面制备Ni基合金及Ni基合金/B4C复合涂层。

Using sintered B4C as target material , ternary BCN thin films were synthesized by means of pulsed laser deposition assisted by nitrogen ion beam .

以烧结B4C为靶材料、在氮离子束辅助下用脉冲激光沉积方法制备了三元化合物硼碳氮（BCN）薄膜。

The results show that the flexibility strength and the fracture toughness of B4C / Al composite is greatly improved compared with those of monolithic boron carbide .

结果表明，B4C/Al复合材料的抗弯强度和断裂韧性与单一B4C材料相比有显著提高。

After conforming the minimum bilayers number , W / B4C broadband multilayers have been designed successfully by using a global optimization algorithm : Genetic Algorithms .

在确定了宽带多层膜的最小膜对数后，应用具有全局优化特性的遗传算法完成了W/B4C宽带多层膜的优化设计。

Phase , grain size , fracture mechanism of ZrB2 / B4C ceramic materials are investigated by X-ray diffraction , scanning electron microscope ( SEM ) .

通过X-光衍射仪、扫描电镜等分析手段，分析了ZrB2/B4C陶瓷材料的物相组成、晶粒大小和增韧机制。

Reaction-bonded B4C / SiC was fabricated by gel-casting using silicon carbide , boron carbide and carbon black as raw materials in this subject .

本课题以SiC、B4C粉末和碳黑为原料，采用凝胶注模工艺成型，制备反应烧结B4C/SiC复合材料。

Analyzing to the interface condition shows that the combination of B4C / Al interface is better than those of SiC / Al and Al 2O3 / Al .

对界面状态的研究分析表明，B4C/Al复合材料的界面结合状况明显好于SiC/Al复合材料和Al2O3/Al复合材料。

The reaction diffusion path demonstrated by the diffusion couple is : Ti / TiCx / TiB / TiB2 / B4C .

利用扩散偶实验证实了该温度条件下的反应扩散路径为：Ti／TICx。／TiB／TiB2／B4C。

The mechanical test of the composites fabricated in different infiltration time and made of different aluminum alloys prove that in the selected technology conditions , the B4C / A1 composites have a better mechanical properties .

对不同浸渗时间，不同铝合金渗体的B4C／Al复合材料进行力学性能测试及断口分析，结果表明：在优选工艺条件下制备的B4C／Al复合材料具有较好的力学性能。

Results obtained show that there is no distinct B2O3 in the VPS B4C coating , indicating that the oxidation of B4C can be avoided during VPS process .

结果显示，真空等离子喷涂B4C涂层中没有出现明显的B2O3相，表明真空等离子喷涂可有效避免B4C氧化现象。

After accomplishing the calibration of deposition rate and minimum thickness experiments , we have successfully fabricated W / B4C broadband multilayer at Cu K α radiation ( 0.154nm ) .

在完成速率定标验证实验和最小成膜实验后，成功地制备出了工作在Cu的Kα线（0.154nm）的X射线W/B4C宽带多层膜。

The flexibility strength and fracture toughness of B4C / Al composite respectively increase 18.39 % , 75.27 % . But the hardness of B4C / Al composite decreases compared with monolithic boron carbide .

B4C/Al复合材料的抗弯强度及断裂韧性分别比单一B4C提高了18.39%和75.27%，但其硬度降低。

On the Beijing Synchrotron Radiation X-ray Fluorescence Analysis Spectroscopy ( XFAS ) beam line , the W / B4C multilayer film was used as the monochromator instead of the crystal for the XFAS experiment .

在北京同步辐射荧光束线（4W1B）上，利用W/B4C多层膜获取准单色光，实现材料的荧光分析实验。

From optical characteristics of materials based on the atomic scattering factor , the thesis introduces the reflectivity characteristic of X-ray from ideal and nonideal interface , discusses the method of selecting and confirming materials W 、 B4C for broadband multilayer .

本文从基于原子散射因子的光学特性出发，讨论了X射线在理想和非理想界面的反射特性，探讨了宽带多层膜材料W、B4C的选定方案；

In order to verify the theory of the interface roughness of W / B4C multilayers varying with its bi-layer number , the interface roughness of about the top 100 bi-layers were characterized by using the X-ray scattering measurement method .

为验证W/B4C周期多层膜界面粗糙度随膜层数变化的理论，利用X射线散射方法表征具有不同周期数的W/B4C多层膜的最顶层的约100个膜对的界面粗糙度。

The density , flexure strength and fracture toughness of B4C / ( W , Ti ) C ceramic composites continuously increased with increasing ( W , Ti ) C content , while the hardness decreased with increasing ( W , Ti ) C content .

B4C/（W，Ti）C陶瓷喷砂嘴材料的相对密度、抗弯强度和断裂韧性随（W，Ti）C含量的增加而增大，而硬度随（W，Ti）C含量的增加而降低。

The analyses of B4C / Al composite by using the fracture SEM and the back-scattering equipment show that , the microstructure of B4C / Al composite prepared by pressureless infiltration technology is more evenly distributed and compacted without large size defects of microstructure .

B4C/Al复合材料经扫描电镜和背散射仪分析后发现，无压浸渗法制备的B4C/Al复合材料中没有大尺寸的显微缺陷，组织分布比较均匀、致密；