共查询到20条相似文献，搜索用时 706 毫秒
1.
选择含氮节镍型QN2109Mo奥氏体不锈钢作为研究对象,采用XRD、TEM、SEM、EDS、摩擦磨损试验机和电化学工作站等检测手段,研究QN2109Mo不锈钢的组织结构、摩擦磨损性能以及耐腐蚀性能,并与316L不锈钢进行对比。实验结果表明:N原子主要以间隙固溶形式存在于QN2109Mo不锈钢中,对QN2109Mo不锈钢组织起到了细化作用,提高了QN2109Mo 不锈钢的硬度。在干摩擦状态下,QN2109Mo不锈钢的耐磨损性能优于316L不锈钢,其磨损机理为氧化磨损和磨粒磨损共同作用。在w(NaCl)为3.5%的溶液中,QN2109Mo不锈钢表现出比316L不锈钢更低的自腐蚀电流密度和更高的点蚀电位,具有更优异的耐NaCl 溶液腐蚀性能。 相似文献
2.
AWAD Samir Hamid 《重庆大学学报(英文版)》2005,4(1)
1 Introduction Weight saving materials such as aluminum and its alloys are becoming increasingly important and have been attracting increasing attention over the past decade, specially in the automotive, aerospace and chemical industries, and electrical devices because of their high strength-to-weight ratio, high electrical and thermal conductivities, processability and recyclability and good resistance to degradation in some corrosive environments [1,2]. In the automotive industry, there is d… 相似文献
3.
用真空离子镀技术在L316医用不锈钢表面镀上一层氨化钛薄膜,制成氮化钛-不锈钢复合体,并以纯钛及医用L316不锈钢作对照,植入60只小白鼠的胫骨内．经扫描电镜等观察结果表明：氮化钛-不锈钢复合体及纯钛材料与骨之间都形成骨整合及纤维整合界面,但是,氮化钛-不锈钢复合体比纯钛材料骨性结合界面形成早,成骨活跃 相似文献
4.
The purpose of this paper is to present the design and techniques used by the Educational Technology program at the University of South Carolina to prepare scholarly practitioners with action research methods in an online doctoral program. With an emphasis on students’ local contexts, we will describe the design of experiences and our lessons learned. This paper could aid higher education faculty, administrators, and educators that train scholarly practitioners who engage in scholarship to improve practice. 相似文献
5.
Hendrik Dubbe Elena Holl Adriaan Spierings Konrad Wegener Ulrich Nieken 《浙江大学学报(A卷英文版)》2018,19(10):735-745
Examples of the use of additive manufacturing and rapid prototyping in a range of applications are of great interest in order to emphasize their role in development and production technology. In this study, a catalytic low temperature burner for H2 on a lab scale with an integrated flow distributor was designed, manufactured, and tested for functionality. Based on a theoretical approach, a flow distributor for the burner was designed and a prototype was built using fused deposition modeling (FDM). Based on test results, an optimized version of the burner was then designed and manufactured using selective laser melting (SLM). The functionality of the designed catalytic burner was proven. Several advantages were found in comparison to conventional non-catalytic burners. In particular, flameless uniform low temperature heat generation with temperatures of about 200 °C could be realized. This contribution highlights the potential of additive manufacturing in chemical engineering. Not only was the final product built using SLM, but also during the development process, FDM was used for rapid prototyping. 相似文献
6.
简要介绍了高校实验室仪器设备风险分析基础、内容及其对实验室安全管理的重要意义,以华南理工大学分析测试中心为例,对风险分析技术在高校实验室仪器设备安全管理中的应用进行了初步研究。 相似文献
7.
In any engineering curriculum, education and training in quality technology should be offered. In Linköping all engineering students now have the possibility to take such a course. In this paper we describe the programme offered by the Division of Quality Technology at Linköping University. We also give some brief comments on the research programme at the Division of Quality Technology. 相似文献
8.
研究了1Cr18Ni9Ti不锈钢在磷酸—硫酸—铬酐等电解液中电化学抛光后的性能。结果表明:电化学抛光后1Cr18Ni9Ti表层钝化膜形成,其耐腐蚀性明显提高,表面光亮度比机械抛光明显提高,可达镜面程度。同时冷作硬化层的去除,使表面显微硬度稍下降,电化学抛光可提高1Cr18Ni9Ti不锈钢的宏观性能。 相似文献
9.
《Educational Philosophy and Theory》1991,23(2):97-113
Book reviewed in this article:
Michael D. Stephens, Culture, Education and the State
Reviewed by Patrica White, University of London.
Reviewed by Fazal Rizvi, University of Queensland.
Brian V. Hill, Values Education in Australian Schools, Australian Council for Educational Research
Gail P. Kelly & Sheila Slaughter (eds.), Women's Higher Education in Comparative Perspective
Reviewed by Marjorie O'Loughlin, University of Sydney.
Wally Morrow, Chains of Thought: Philosophical Essays in South African Education, Johannesburg
Reviewed by Don Margetson, Griffith University.
Robin Barrow, Understanding Skills: Thinking, Feeling, and Caring
Reviewed by Paul J. Hager, University of Technology 相似文献
Michael D. Stephens, Culture, Education and the State
Reviewed by Patrica White, University of London.
Reviewed by Fazal Rizvi, University of Queensland.
Brian V. Hill, Values Education in Australian Schools, Australian Council for Educational Research
Gail P. Kelly & Sheila Slaughter (eds.), Women's Higher Education in Comparative Perspective
Reviewed by Marjorie O'Loughlin, University of Sydney.
Wally Morrow, Chains of Thought: Philosophical Essays in South African Education, Johannesburg
Reviewed by Don Margetson, Griffith University.
Robin Barrow, Understanding Skills: Thinking, Feeling, and Caring
Reviewed by Paul J. Hager, University of Technology 相似文献
10.
李传生曾寿金许明三刘广何伟辉 《福建工程学院学报》2021,(4):349-355
基于三周期极小曲面(TPMS)设计5种不同孔隙率梯度分布的梯度多孔支架,利用选区激光熔化(SLM)技术制造Ti6Al4V梯度多孔支架。该支架具有类似于人骨梯度多孔结构的梯度孔隙率。压缩测试结果表明,5种梯度多孔支架的弹性模量为8.75~13.88 GPa,抗压强度为219.48~ 528.21 MPa,符合承载骨的弹性模量和抗压强度要求。弹性模量和抗压强度都随着平均孔隙率P- (或边缘孔隙率PB )的增大而减小,P-对弹性模量和抗压强度的影响大于PB。采用Gibson-Ashby的拟合结果可以为承载骨的设计提供参考。 相似文献
11.
利用可视化软件Citespace对CSSCI数据库中检索到的以高校后勤为主题的608篇文献进行研究现状分析.采用文献计量分析.研究表明：张和仕、皮光纯、杨家民、杨明生等是核心作者;南京大学、清华大学、苏州大学、华南农业大学、中南大学、华中科技大学是核心发文单位;相关文献可以分为高校后勤社会化、高校后勤改革以及社会主义市场经济体制三大研究领域.研究结论：我国高校后勤研究成果丰富,为高校后勤提供了有力支撑;高校后勤研究依然存在很大的拓展空间. 相似文献
12.
This paper examines perceptions of professional and organizational identity of teacher educators in a ‘new’ University of Technology in South Africa, resulting from several recent mergers of colleges of education and colleges of technology mainly serving formerly disadvantaged students and schools. The findings show that most staff consider teaching and research as dichotomous. Research activities are seen to satisfy the institutional requirements for securing research funding and producing publications. Professional identities could be strengthened by a faculty-wide debate on the specific profile of teacher education in a University of Technology, resulting also in an agreed research ethos. Peer support in collaborative research groups with a focus on own practice is seen as an opportunity to strengthen research expertise. 相似文献
13.
Surface engineering has been emerging as one of the most promising technologies to improve the tribological properties of biomaterials with a view to extending the life span of medical implants. For example, some novel surface engineering techniques including ion implantation of ultra-high molecular weight polyethylene (UHMWPE) and thermal oxidation (TO) treatment of titanium alloy have been developed. However, the full potential of improving the wear resistance of orthopaedic implants based on the UHMWPE/ Ti6A14V system will not be realized until the tribological performance of this surface engineered tribo-system is fully characterized and the acting wear mechanisms are well understood. In this paper, a pin-on-disc tribometer was employed to evaluate the tribological response of the following three tribo-systems: (1) untreated UHMWPE/untreated Ti6A14V. (2) untreated UHMWPE/TO-treated Ti6A14V and (3) ion implanted UHMWPE/TO treated Ti6A14V under water lubricated conditions. Experimental results show that the tribological properties of UHMWPE can be significantly increased by surface enghmering its surface and/or the counterface. Tiffs can be attributed to the hardened surface of UHMWPE via molecular structure modification induced by ion bean bombardment coupled with the surface oxide layer on Ti6A14V formed during TO treatment, which has favorable tribological compatibility with UHMWPE. 相似文献
14.
介绍了在“一流专业”建设背景下,北京化工大学自主研制的用于过程装备与控制工程专业实验教学的多功能综合实验装置。这些实验装置将阀门、泵、压缩机、承压壳体等典型过程设备或机械与过程参数控制技术有机融合,综合性能优越,应用这些实验装置显著地减少了专业实验教学装置的投入,有效提高了实验装置利用率,并易于开发设计型和研究型实验项目,加强了学生动手能力、创新意识和科研素质的培养。目前实验装置已成功应用于北京化工大学的本科教学中,并已被国内多所高校采用。 相似文献
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16.
毛依群 《马钢职工大学学报》2013,(3):74-77
技术攻关是企业生存与发展的重要手段。作为钢轧一体化的现代大工业生产厂家,一钢轧总厂生产线长而复杂产品品种繁多,工艺技术、质量控制、生产组织和设备管理的难度相当大。为解决这些复杂的问题,通过运用现代管理工具采用计算机控制手段,以构建技术攻关课题管理的新模式,使攻关课题管理工作变得更加高效科学。 相似文献
17.
徐晓刚 《兰州石化职业技术学院学报》2008,8(3):16-19
316不锈钢海水泵叶轮,使用10～12月后损坏严重。对叶轮失效原因分析表明：叶片减薄严重的主要原因是高流速海水中的固体颗粒（粉砂）的磨削作用加速的磨损腐蚀。选择对316不锈钢叶轮采用表面高分子涂耐磨涂层的方案可延长叶轮使用寿命,且更为经济、可行。 相似文献
18.
本文主要就中南工业大学园林花卉植物的种类组成、结构特点、优势科和优势种等进行了调查研究：中南工业大学园林花卉植物共有２８７种,隶属于９７科２０２属;优势科是蔷薇科、百合科、龙舌兰科、大戟科、豆科、柏科等;优势种为樟树、广玉兰、水杉、枫杨、法国梧桐、喜树等．最后,根据现代国内外园林绿化的发展趋势,针对中南工业大学园林绿化现状中骨干树种趋于单一,功能不齐全以及垂直绿化等几个方面作了初步探讨 相似文献
19.
人才培养、科学研究和服务社会,是国家赋予高等教育的三项主要职能。地方高校承担着为地方经济建设与社会发展培养大批各类人才、服务区域经济发展、促进地方小康社会全面建设的重任。广东石油化工学院地处广东省茂名市,而茂名既是中国南方最大的石化生产基地,又是中国最大的水果生产基地,如何把广东石油化工学院的科技创新和知识优势转化为产业优势,从而推动地方区域经济的全面快速发展,这是广东石油化工学院学人需要不断研究和探讨的重要课题。同时,为地方经济发展做贡献是地方高校义不容辞的责任。 相似文献
20.
高校作为当前党政干部培训机构的重要补充,为干部的培养工作发挥了重大作用。近年来,华南理工大学依托学校的品牌、师资、学科以及地缘优势,立足广东,辐射全国,主动服务社会,开展了各类型、多层次的干部培训,取得了良好的社会效益。以华南理工大学的干部培训项目为研究案例,寄望为其他高校的干部培训项目发展提供一个参考样本。 相似文献