期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
含能材料部件几何量测量技术应用进展 被引量:1
1
作者 刘勇 高国防 +4 位作者 张晓华 陈玉国 彭亚会 赵华 张书根 《含能材料》 EI CAS CSCD 北大核心 2016年第7期715-722,共8页
总结了含能材料部件及其几何量测量的相关定义,并从机械量具测量、固定式三坐标机测量、便携式坐标测量、光学非接触三维测量四方面综述了国内外含能材料部件几何量测量技术的应用进展,分析了各种测量技术的优缺点,提出了光学非接触测... 总结了含能材料部件及其几何量测量的相关定义,并从机械量具测量、固定式三坐标机测量、便携式坐标测量、光学非接触三维测量四方面综述了国内外含能材料部件几何量测量技术的应用进展,分析了各种测量技术的优缺点,提出了光学非接触测量技术在含能材料部件几何量测量方面的应用前景,并指出了未来含能材料部件在不同精度要求、尺寸范围内的几何量测量技术发展方向。 展开更多
关键词 含能材料部件 几何量测量 三坐标机
下载PDF
输变电金属材料部件失效与措施 被引量:2
2
作者 迟磊 《黑龙江科技信息》 2015年第7期1-,共1页
本文根据输变电金属材料部件进行失效部位分析,讨论研究输变电金属材料部件失效的原因,并针对原因寻找有效措施。
关键词 输变电 金属材料部件 失效
下载PDF
轨道车辆整车空气质量检测研究 被引量:1
3
作者 何雪珠 冯静弦 +1 位作者 顾也飞 刘海兰 《技术与市场》 2021年第5期48-50,共3页
选取了近年来几种典型车型的整车空气质量检测结果,对整车空气质量影响大的前十项物质进行分析,找出出现频率高、贡献大的几种物质,通过文献查找分析其可能来源,结合材料、部件VOC检测方法分析,为今后的整车研发、工艺和质量等过程提供... 选取了近年来几种典型车型的整车空气质量检测结果,对整车空气质量影响大的前十项物质进行分析,找出出现频率高、贡献大的几种物质,通过文献查找分析其可能来源,结合材料、部件VOC检测方法分析,为今后的整车研发、工艺和质量等过程提供整车空气质量改善方案的思路。 展开更多
关键词 整车空气质量 VOC 管控 材料部件
下载PDF
Observation of interface of two kinds of bi-metal composite parts prepared by thixo-forging 被引量:4
4
作者 杨昭 周丽 董建雄 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第9期1579-1584,共6页
Two kinds of bi-metal composite parts (Sn-15%Pb and Pb-22%Sn bi-metal system, and Al-7%Si and SiCp/6061 MMC bi-metal system) were prepared by the strain-induced melt activated thixo-forging. The interfaces of the bi... Two kinds of bi-metal composite parts (Sn-15%Pb and Pb-22%Sn bi-metal system, and Al-7%Si and SiCp/6061 MMC bi-metal system) were prepared by the strain-induced melt activated thixo-forging. The interfaces of the bi-metal composites were observed by OM and SEM. The observations show that the semisolid metals keep independence during thixo-forging. The solid phases in the semisolid slurries maintain their original morphologies after thixo-forging. The liquid phases near the interface mix together and form a thin layer. The interfaces are bonded firmly with the metallurgical bonding. No oxide layers are found at the interfaces. Strengths of the interfaces were investigated by the micro-hardness test. The experimental results show that the composite interfaces have high strength. However, the agglomerated enhancing particles cause fine defect on the interface of the Al-7%Si and SiCr/6061 MMC bi-metal composite. 展开更多
关键词 semisolid metal processing bi-metal composite thixo-forming die-forging metal matrix composite
下载PDF
Comparison of wear behavior of ABS and Nylon6-Fe powder composite parts prepared with fused deposition modelling 被引量:2
5
作者 Harish Kumar Garg Rupinder Singh 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期3705-3711,共7页
Fused deposition modeling(FDM) is one of the latest rapid prototyping techniques in which parts can be manufactured at a fast pace and are manufactured with a high accuracy. This research work is carried out to study ... Fused deposition modeling(FDM) is one of the latest rapid prototyping techniques in which parts can be manufactured at a fast pace and are manufactured with a high accuracy. This research work is carried out to study the friction and wear behavior of parts made of newly developed Nylon6-Fe composite material by FDM. This work also involves the comparison of the friction and wear characteristics of the Nylon6-Fe composite with the existing acrylonitrile butadiene styrene(ABS) filament of the FDM machine. This Is carried out on the pin on disk setup by varying the load(5, 10, 15 and 20 N) and speed(200 and 300 r/min). It is concluded that the newly developed composite is highly wear resistant and can be used in industrial applications where wear resistance is of paramount importance. Morphology of the surface in contact with the Nylon6-Fe composite and ABS is also carried out. 展开更多
关键词 composite material fused deposition modeling(FDM) parts TRIBOLOGY pin on disc iron(Fe) Nylon 6 acrylonitrile butadiene styrene(ABS)
下载PDF
TENCEL -A High-Performance Sustainable Cellulose Fiber for the Construction Industry/Composites
6
作者 Frlednch Suchomel Martin Marsche 《Journal of Chemistry and Chemical Engineering》 2013年第7期626-632,共7页
Fibers are used in various areas for improving the performance of different materials, commonly used are synthetic fibers and glass fibers. More and more sustainable alternatives are required to reduce energy consumpt... Fibers are used in various areas for improving the performance of different materials, commonly used are synthetic fibers and glass fibers. More and more sustainable alternatives are required to reduce energy consumption and the carbon footprint. Traditional natural fibers (like hemp or flax) very often do not fulfill requirements for construction purposes like resistance to elevated temperature or lacking purity. Also mechanical properties of natural fibers are influenced by factors like harvesting, kink bands, climate and growth conditions. Lenzing AG has put a lot of efforts into developing a sustainable fiber overcoming the above mentioned issues. The raw material for TENCEL is wood, which is transformed into a fiber of pure cellulose in an economy friendly process as been proven by a life cycle assessment. The properties of a composite material are highly dependent on parameters like mechanical fiber properties, fiber diameter, quality of fiber dispersion and fiber matrix adhesion. Keeping these properties constant throughout the whole composite part is the factor to success. The diameter as well as the mechanical properties of TENCEL fibers is kept within a very narrow range thanks to the unique manufacturing process. It was shown that the fiber dispersion of TENCEL as well as the fiber matrix adhesion is better than for natural fibers. 展开更多
关键词 TENCEL~ cellulosic fiber plastic reinforcement concrete sustainability.
下载PDF
Foundation Assessment in Different Parts of Iraq Using STAAD Pro V8i 被引量:2
7
作者 Entidhar A1-Taie Nadhir A1-Ansari Sven Knutsson Tarek Edrees Saaed 《Journal of Civil Engineering and Architecture》 2013年第3期273-281,共9页
Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be de... Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be defined. There are number of differences in the geological and soil conditions in Iraq. As a consequence, these differences are reflected on the type of foundation to be used. Despite these differences, same materials and style of buildings are used all over Iraq. The main problems of Iraqi soil are high gypsum content, salinity and shallow water table depth. These factors that influence the foundations are the soil properties and the amount of loads that transmitted by the superstructure. The situation has been analysed through a case study which illustrated the link between soil and foundation types in three different parts of Iraq (Mosul, Baghdad and Basra). One building was analysed using "STAAD (structural analysis and design). Pro" software in these regions. It is evident that Iraqi designers and engineers require local code to define all the loads, materials and design of the foundation to be used. The use of local materials might be very effective from both engineering and economic perspectives. 展开更多
关键词 GYPSUM bearing capacity Iraqi soil raft foundation foundation design base pressure
下载PDF
Wafer-scale arrayed p-n junctions based on few-layer epitaxial GaTe 被引量:5
8
作者 Xiang Yuan Lei Tang +12 位作者 Peng Wang Zhigang Chen Yichao Zou Xiaofeng Su Cheng Zhang Yanwen Liu Weiyi Wang Cong Liu Fansheng Chen Jin Zou Peng Zhou Weida Hu Faxian Xiu 《Nano Research》 SCIE EI CAS CSCD 2015年第10期3332-3341,共10页
Two-dimensional (2D) materials have attracted substantial attention in electronic and optoelectronic applications with the superior advantages of being flexible, transparent, and highly tunable. Gapless graphene exh... Two-dimensional (2D) materials have attracted substantial attention in electronic and optoelectronic applications with the superior advantages of being flexible, transparent, and highly tunable. Gapless graphene exhibits ultra-broadband and fast photoresponse while the 2D semiconducting MoS2 and GaTe exhibit high sensitivity and tunable responsivity to visible light. However, the device yield and repeatability call for further improvement to achieve large-scale uniformity. Here, we report a layer-by-layer growth of wafer-scale GaTe with a high hole mobility of 28.4 cm^2/(V.s) by molecular beam epitaxy. The arrayed p-n )unctions were developed by growing few-layer GaTe directly on fhree-inch Si wafers. The resultant diodes reveal good rectifying characteristics and a high photovoltaic external quantum efficiency up to 62% at 4.8 μW under zero bias. The photocurrent reaches saturation fast enough to capture a time constant of 22 μs and shows no sign of device degradation after 1.37 million cycles of operation. Most strikingly, such high performance has been achieved across the entire wafer, making the volume production of devices accessible. Finally, several photoimages were acquired by the GaTe/Si photodiodes with reasonable contrast and spatial resolution, demonstrating the potential of integrating the 2D materials with silicon technology for novel optoelectronic devices. 展开更多
关键词 GATE wafer-scaletwo-dimensional materials p-n junction imaging PHOTODIODE PHOTOSENSOR
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部