材料期刊网，材料期刊，材料类期刊，材料期刊投稿

By implanting B+ and O+ ions respectively into polycarbonate (PC) plates, the sur-face mechanical properties of PC have been improved. Measurement by Nano IndenterⅡ showed that the hardness of samples increased 7-25 times than that before implan-tation; and the modulus of elasticity raised 2-5 times. The wear-resistance was testedby ball crusher; the width and depth of the wear-streak decreased by 1/3-1/2 or evenmore. The structure, deformation and appearance were analyzed by using Micro-FTIR Spectra, ESCA method and the steps instrument. These analyses showed thatthe structure of PC had been modified: a series of new cross-linking yielded, it de-pends on the Linear Energy Transition (LET) of implanted ions in the high polymercompounds.

关键词: polycarbonate , null , null

钛等金属的SUN-Z-R复合技术

吴全兴

钛工业进展 doi:10.3969/j.issn.1009-9964.2001.02.008

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TENSILE TESTING OF C/C COMPOSITES ATHIGH TEMPERATURES

Author S.R. Zhou , S.R. Qiao , S.H. Bai and C.S. Tian Faculty 401 , Northwestern Polytechnical University , Xian 710072 , ChinaManuscript received 18 October 1998

金属学报(英文版)

The tensile properties of three different carbonfiberreinforced carbon composites (C/C), mat C/C, 2D laminate and 4D C/C, were investigated under the combined influence of temperature and loading rate. From the experiments the following could be concluded: loading rate between 10-1-10 mm/min was valid; the fracture stress of the three kinds of C/C composites increased with increasing temperature in the range from room temperature to 1900, and the initial modulus of 2D laminate C/C composites increased with the increase of temperature up to 2000.

关键词: tensile testing , null , null , null

C/C-PAA与C/C-FA弯曲性能对比

张万强 , 赵英民 , 王涛 , 詹万初

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2014.05.012

通过PIP工艺制备了C/C-PAA、C/C-FA复合材料,对PAA、FA裂解碳的XRD、浸渍效果以及C/C-PAA和C/C-FA的弯曲强度进行了分析.结果表明:PAA裂解碳的炭质量、浸渍效果较好,C/C-PAA弯曲强度比C/C-FA弯曲强度高34.9％,弯曲模量对比不明显.

关键词: 聚芳基乙炔 , 糠酮树脂 , X射线衍射 , C/C复合材料

偏光观察C/C复合材料

张保法 , 阮宏武 , 李东生

材料工程 doi:10.3969/j.issn.1001-4381.2006.01.008

利用正交偏光可分辨C/C复合材料中不同类型的沉积炭,通过旋转检偏器可测量C/C复合材料中沉积炭的消光角度.列举了偏光观察C/C复合材料实验过程中经常遇到的问题,介绍了测定消光角度的方法,简要概述了近年来研究热解炭各向异性的成果.

关键词: C/C复合材料 , 化学气相沉积 , 消光角度 , 偏光显微镜

C/C及C/C-Cu复合材料的摩擦磨损性能

孙乐 , 方向青 , 孟广慧

材料科学与工程学报 doi:10.14136/j.cnki.issn 1673-2812.2016.05.027

通过化学气相渗透(CVI)、树脂浸渍/碳化(I/C)的工艺制成多孔的C/C预制件,采用气体压力浸渗方法向预制体中渗入铜,制备出C/C-Cu复合材料.以高密度C/C复合材料(1.9g/cm3)作为对比样,在MM-200型磨损试验机上对其摩擦磨损性能进行测试,并对其微观结构和摩擦磨损机理进行分析.研究结果表明:C/C-Cu的摩擦系数比C/C复合材料的低,这主要与摩擦表面的摩擦膜有关,铜在摩擦力带动下填充摩擦表面的凹坑,并与碳材料共同形成摩擦膜,摩擦膜的碳含量越高,润滑效果越好.当C/C预制件密度为1.59 g/cm3时,C/C-Cu的摩擦系数和磨损量均小于C/C复合材料,摩擦磨损性能良好.

关键词: C/C-Cu , 摩擦磨损 , 摩擦膜

Electronic transport properties of NbC(C)-C nanocomposites

Physical Review B

We report the electronic transport properties of a composite system comprising zero dimensional superconducting NbC(C) nanocapsules and carbon nanofiber matrix. DC susceptibility measurements of the nanocomposite indicate that the critical temperature (T-C) of NbC nanocrystals is 10.7 K. The temperature dependence of electrical resistivity of the specimen pellet follows the Mott's T-1/4 law in a temperature range between T-C of NbC and 300 K, owing to a strong degree of structural disorder in the carbon matrix. Below the T-C of NbC, when the change of its electrostatic energy Delta E is far greater than the thermal energy, an electron will be localized on an isolated NbC nanocrystal at very low temperatures, leading to "Coulomb Blockade." As a result, a collective behavior of the single-electron tunneling effect takes place in a three-dimensional granular superconductors' network composed of the NbC/carbon/NbC tunneling junctions. The superconducting gap of NbC crystals is not found in the current-voltage curves, due to the suppression of surface superconductivity through the contact between NbC and carbon shells.

关键词: zero-dimensional superconductor;granular metal-films;particles;conduction;nanocapsules;percolation;samples

Oxidation behavior of C/C-SiC gradient matrix composites

材料科学技术（英文）

Oxidation behavior of C/C-SiC gradient matrix composites and C/C composites were compared in stationary air. The results show that oxidation threshold of C-SiC materials increases with the amount of SiC particles in the codeposition matrix. Oxidation rate of C/C-SiC gradient matrix composites is significantly lower than that of C/C material. The micro-oxidation process was observed by SEM.

关键词: carbon carbon composites

Oxidation behavior of C/C-SiC gradient matrix composites

Jingyi DENG , Wenchuan LIU , Haifeng DU , Huiming CHEN , Yiyi LI

材料科学技术（英文）

Oxidation behavior of C/C-SiC gradient matrix composites and C/C composites were compared in stationary air. The results show that oxidation threshold of C-SiC materials increases with the amount of SiC particles in the codeposition matrix. Oxidation rate of C/C-SiC gradient matrix composites is significantly lower than that of C/C material. The micro-oxidation process was observed by SEM.

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