检索结果-南通市图书馆

Grinding Characteristics Of Directionally Aligned sic whisker Wheel - Comparison With A12O3 Fiber Wheel

Journal of Donghua University(English Edition) 2003年第4期20卷 70-75页

作者：魏源迁山口胜美菊泽贤二洞口严中根正喜 School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464 - 8603 Japan Xebec Technology Company Ltd. 3-2-2 Kudan-minami Chiyoda-ku Tokyo102 Japan Toyota College of Technology Eisei-cho 2-1 Toyota-shi Aichi-ken 4 71 Japan Sumitomo Metal Industries Ltd. 4-5-33 Kitahama Osaka 541 -0041 Japan unique SiC whisker wheel was invented in which the whiskers were aligned normally to the grinding wheel surface. In this paper grindabilities of the SiC whisker wheel are investigated and compared with those of other wheels of SiC grains Al2O3 grains as well as Al2O3 long and short fibres which were also aligned normally to the grinding wheel surface respectively. The main research contents concern grinding characteristics of a directionally aligned SiC whisker wheel such as material-removal volume wheel-wear rates integrity of the ground surfaces grinding ratios and grinding efficiency. Furthermore grinding wheels of whiskers and fibres have a common disadvantage: they tend to load easily. The authors have proposed a simple method of loading-free grinding to overcome this propensity and investigate some related grinding characteristics under loading-free grinding conditions.

A unique sic whisker wheel was invented,in which the whiskers were aligned normally to the grinding wheel *** this paper,grindabilities of the sic whisker wheel are investigated and compared with those of other wheels of sic grains,Al2O3 grains,as well as Al2O3 long and short fibres which were also aligned normally to the grinding wheel surface,*** main research contents concern grinding characteristics of a directionally aligned sic whisker wheel such as material-removal volume,wheel-wear rates,integrity of the ground surfaces,grinding ratios and grinding ***,grinding wheels of whiskers and fibres have a common disadvantage:they tend to load *** authors have proposed a simple method of loading-free grinding to overcome this propensity and investigate some related grinding characteristics under loading-free grinding conditions.

关键词： Grinding Grinding wheel sic whisker Al2O3 fiber Directional alignment Loose grain Loading-free Grinding ratio Surface roughness

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE EFFECT OF sic PARTICLE AND whisker ON THE STRENGTHOF ALUMINUM ALLOY MATRIX COMPOSITES

引用

Acta Metallurgica Sinica(English Letters) 1997年第1期10卷 22-34页

作者： HSekine

The effects of sic particle and whisker on the strength of aluminum alloy matrix composites have been discussed. The effects of the characteristics of discontinuons reinforcements on the strength of compsites was revealed on the basis of a review of the elastic-plastic finite element method which was applied to predict the stress-strain constituent relationship for particle and whisker reinforeed MMCs. It is snggested that the reinforcement shape or morphology, aspect ratio and distribution in the matrix should be considered in order to get more accumte numerical results. Theoretical strength analysis models predicted the trend of the strength for particle MMCs, but the theoretical results are generally lower compared with the experimental results, especially for the lower strength aluminum alloy. This is becaase strength theories did not consider the change of microstructure of reinforced matrix after particle incorpomtion. We have proposed a combined microstructure strengthening analysis, and the prediction is consistent with the eperimental results.

关键词： sic particle sic whisker reinforcement yield strength MMCs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of whisker alignment on microstructure,mechanical and thermal properties of Mg-sic_(w)/Cu composite fabricated by a combination of casting and severe plastic deformation(SPD)

引用

Journal of Magnesium and Alloys 2023年第3期11卷 966-980页

作者： Yinwei Wang Moslem Tayyebi Morteza Tayebi Mahdireza Yarigarravesh Shoufa Liu Hongwei Zhang School of Mechanical Engineering Xijing UniversityXi’anShaanxi 710123China Department of Materials Science and Engineering Shiraz University of TechnologyShirazIran Young Researchers and Elites Club Science and Research BranchIslamic Azad UniversityTehranIran Department of Civil Engineering Adjunct facultySharif University of TechnologyTehranIran

In this research,microstructure evaluation,mechanical properties and thermal conductivity of the Mg-sic_(w)/Cu composite with laminar structure were *** this purpose,sic whiskers were added to magnesium alloy by using stir-casting,then the Mg-sic_(w)composite was bonded to copper layers by warm accumulative roll bonding(ARB).Based on the results of optical microscopy(OM)and scanning electron microscopy(SEM),sic whiskers were well distributed in the magnesium matrix and they were aligned parallelly when the composites were plastically deformed at higher rolling ***,all layers remained continuous with localized necking ***,no intermetallic compounds and phases were detected by XRD and EDS *** from the significant effect of severe plastic deformation on mechanical properties,the findings of mechanical tests point to the usefulness of reinforcements in improving up to 60%microhardness,Young’s modulus,yield,and up to 41%tensile ***,thermal conductivities of composites increased by adding reinforcement and above all by increasing the number of rolling *** growth is attributed to the higher thermal diffusivity of copper and whiskers as well as the increased number of conductive layers within composite.

关键词： sic whisker Warm accumulative roll bonding Stir-casting Thermal conductivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

whisker Orientation Function and Elastic Modulus of the as-cast 20% sic_W/Mg Composite

引用

Rare Metals 2001年第4期20卷 270-274页

作者： Chuanhai Jiang1, Jiansheng Wu1, Mingyi Zheng2, Dezun Wan 2 1) Key Laboratory for High Temperature Materials and Tests of the Ministry of Education, Shanghai Jiaotong University. Shanghai 200030, China 2) School of Materials Science and Engineering, Harb 上海交通大学教育部高温材料及高温测试重点实验室上海 200030 哈尔滨工业大学黑龙江哈尔滨 150001

The relationship between the plane-orientation function and the space-orientation function of whiskers in whisker-reinforced metal matrix composites was analyzed theoretically. The actual orientation of whiskers in the as-cast 20%sicw/Mg composite (sicw content in volume fraction) were investigated, and the elastic modulus of the composite was measured with an ultrasonic velocity analyzer. Results show that there is an evident difference between the plane-orientation function and the space-orientation function of whiskers and the space-orientation function can represent the actual condition of the composite. Only by using the space-orientation function of whiskers, the difference of elastic modulus of the as-cast composite in different directions can be explained reasonably.

关键词： sic whisker Mg composite whisker orientation elastic modulus

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabrication of sicw/Ti3sic2 composites with improved thermal conductivity and mechanical properties using spark plasma sintering

引用

Journal of Advanced Ceramics 2020年第4期9卷 462-470页

作者： Xiaobing Zhou Lei Jing Yong Duk Kwon Jin-Young Kim Zhengren Huang Dang-Hyok Yoon Jaehyung Lee Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of Materials Science and Engineering Yeungnam UniversityGyeongsan38541Republic of Korea Union Materials Corporation Daegu42710Republic of Korea

High strength sic whisker-reinforced Ti3sic2 composites(sicw/Ti3sic2)with an improved thermal conductivity and mechanical properties were fabricated by spark plasma *** bending strength of 10 wt%sicw/Ti3sic2 was 635 MPa,which was approximately 50%higher than that of the monolithic Ti3sic2(428 MPa).The Vickers hardness and thermal conductivity(k)also increased by 36%and 25%,respectively,from the monolithic Ti3sic2 by the incorporation of 10 wt%*** remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated *** sicw/Ti3sic2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.

关键词： sic whisker Ti3sic2 mechanical property thermal conductivity spark plasma sintering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on the thermodynamics and the growth kinetics of synthesis of the β-sic whiskers

引用

Journal of Coal Science & Engineering(China) 2003年第2期9卷 90-94页

作者：王启宝郭梦熊 School of Chemical and Environmental Engineering

The thermodynamics and the growth kinetics of synthesis of the sic whiskers (sic w ) from rice hulls are studied in this paper. The results show that the intimate contact of SiO 2 with C in the rice hulls resulted in the formation of sic particle (sic p ) at lower temperature, and the external ash of the hulls (w (SiO 2 )>98%) is the main silicon source for sicw growth. The metallic composite catalyst increases the selectivity for sicw growth and the reaction rate. The growth mechanism of the sicw can be characterized as the VLS (vapour liquid solid) with the presence of the whisker forming catalyst: from sic nucleation through enlargement and growing with the crystallographic orientation in a certain diameter, then the sic w is a complete single crystal of β sic. The generation reaction of SiO is the rate determing step for synthesis of sic w .

关键词： sic whisker VLS mechanism thermodynamics growth kinetics catalyst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Relaxation of residual stresses in 20%sic_w/6061Al composite as-extruded at high temperature

引用

中国有色金属学会会刊：英文版 2001年第5期11卷 729-732页

作者：姜传海吴建生王德尊上海交通大学教育部高温材料及高温测试重点实验室上海 200030 哈尔滨工业大学材料科学与工程学院黑龙江哈尔滨 15000？

The residual stress in a 20%sic w/6061Al composite as extruded was investigated by using X ray stress measurement method. It was found that, high residual stress existed in the composite and residual stress distribution in each direction are not uniform. Relaxation process of residual stress in the composite was dynamically measured during annealing at high temperature. It is verified that the relaxation of residual stress obeys the power law at high temperature. With the creep mechanism, the relaxation behavior of residual stresses at high temperature was analyzed. The results show that, the stress exponent and activation energy for stress relaxation of the composite are obviously higher than those of the matrix alloy.

关键词： sic whisker Al matrix composite residual stress stress relaxation X ray diffraction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interfacial reaction in squeeze cast sic_w/AZ91 composites with different binders

引用

中国有色金属学会会刊：英文版 2001年第2期11卷 217-221页

作者：郑明毅吴昆姚忠凯 Tatsuo Sato Hiroyasu Tezuka Akihiko Kamio School of Materials Science and Engineering Harbin Institute of Technology Department of Metallurgical Engineering Tokyo Institute of Technology Tokyo 152 Japan

The whisker/matrix interfaces in squeeze cast sic w/AZ91 composites with different binders (silica binder, acid aluminum phosphate binder and without binder), were studied by transmission electron microscopy (TEM) and high resolution electron microscopy (HREM). The sic w/AZ91 interface is very clean in the composites with no binders. For the composites with acid aluminum phosphate binders or silica binders, there exists fine discrete interfacial reaction products MgO at the interface, and a definite orientation relationship between MgO and sic w. The interfacial reaction products MgO is unevenly distributed at different parts of the composite ingot with silica binder, and mainly distributed to the interface at the side part of the composite cylinder. While in the sic w/AZ91 composite with acid aluminum phosphate binder, MgO particles are distributed evenly at the interface in almost all the parts of the composite ingot. [

关键词： sic whisker magnesium alloy composites binder interfacial reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Elastic modulus of sic_w/6061Al alloy composites as-squeeze-cast

引用

中国有色金属学会会刊：英文版 2001年第6期11卷 900-903页

作者：姜传海吴建生王德尊 Shanghai Jiaotong University Shanghai Jiaotong University School of Materials Science and Engineering Harbin Institute of Technology

By using the system of image analyzer connected with scanning electron microscope, the whisker orientation in the sic w/6061Al alloy composite as squeeze cast was measured. According to the shear lag model and the actual distribution function of whisker in composite, the inhomogeneity of elastic modulus in composite was analyzed. With the method of ultrasonic velocity, the elastic modulus of composite was measured. The results showed that, the whiskers of composite are preferred in an orientation normal to the direction of squeeze cast. The higher the volume fraction of whisker, the more extent of preferred orientation of it, and the inhomogeneity of elastic modulus is mainly due to the differences of whisker distribution in composite.

关键词： sic whisker composite whisker orientation elastic modulus ultrasonic wave

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of residual stress and dislocation on tensile deformation behavior of sic_w/Al composites

引用

中国有色金属学报 2001年第Z1期11卷 125-128页

作者：胡明胡津费维栋姚忠凯 School of Materials Science and Engineering Harbin Institute of Technology

By means of XRD, Instron electronic tensile machine and TEM, the dislocation states and strengthening mechanisms of sic whisker reinforced pure aluminum matrix composites were studied with different annealing treatment processes and matrixes. The results showed that the strengthening mechanisms of sic w/p Al composite and sic w/6061Al composites are different. For the sic w/p Al composite, the thermal residual stress plays more important role in strengthening than the high density dislocations in matrix; for the sic w/6061Al composite, the dislocation strengthening and precipitation are main strengthening factors.

关键词： sic whisker yield strength dislocation thermal residual stress

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：