周敬恩
长期从事材料强度、断裂与疲劳、机械合金化、纳米材料研究与开发等领域的科学研究工作。
个性化签名
- 姓名:周敬恩
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学术头衔:
博士生导师
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学科领域:
材料科学
- 研究兴趣:长期从事材料强度、断裂与疲劳、机械合金化、纳米材料研究与开发等领域的科学研究工作。
周敬恩,男,1942年5月生,博士,教授,博士生导师。1965年毕业于西安交通大学机械制造系并留校任教。1980年至1982年赴英国阿斯顿大学进修,获博士学位。长期从事材料强度、断裂与疲劳、机械合金化、纳米材料研究与开发等领域的科学研究和教学工作。指导博士研究生15名,硕士生18名。作为主持人或主要参加者承担过国家攻关项目、省部委基金项目、横向课题等30多项研究。出版著作6部,发表论文200余篇;获国家科技进步叁等奖1项,省部级科技进步奖贰等奖3项,叁等奖2项,省级教学成果壹等奖1项。兼任“中国机械工程学会热处理学会” 副理事长,“陕西省材料及热处理学会”理事长,“材料热处理学报”主编,“金属热处理”编委会副主任,“兵器材料科学与工程” 、“国外金属热处理”杂志编委。目前正在进行的科研项目有中美合作项目、各类基金项目等5项,主要研究内容涉及机械合金化微纳米新材料制备,材料与构件的断裂与疲劳、寿命评估及安全评估等。
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【期刊论文】Solid-state reaction of Al/CuO couple by high-energy ball milling
周敬恩, Xi Shengqia, *, Qu Xiaoyan a, Ma Mingliang b, Zhou Jingen b, Zheng Xiulin a, Wang Xiaotian b
Journal of Alloys and Compounds 268(1998)211-214,-0001,():
-1年11月30日
The solid state reaction of Al/CuO induced by high-energy ball milling was studied systematically. When the amount of Al was 20 wt%, only reduction occurred. When the amount of Al exceeded 20 wt%, along with the reduction, a synthesis reaction occurred simultaneously. As the amount of Al ncreased, the reaction products were Cu Al, CuAl or a Al(Cu) solid solution, respectively. The 9 4 2 mechanism of these two types of reactions occurring during ball milling is discussed.
Al/, CuO, Solid state reaction, High-energy ball milling
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【期刊论文】高频淬火1Cr12Ni2W1Mo1V钢点蚀萌生机理探讨
周敬恩, 董俊, 张全慧, 王虹, 林锦棠, 石连峰
机械强度,2001(1):1-4,-0001,():
-1年11月30日
测定了高频淬火后经不同温度回火的1Cr12Ni2W1Mo1V钢试样在不同腐蚀环境以及有外加应力作用下的点蚀电位。结果表明,1Cr12Ni2W1Mo1V钢的点蚀萌生不仅与材料的热处理工艺、微观组织以及腐蚀环境有关,而且与外加应力有很大的关系。点蚀电位Eb随氯离子浓度CCl-增大而降低,且Eb与logCCl-呈直线关系。对于高频淬火+低温回火试样,在一定氯离子浓度(4.373mol/LCl-),pH值对点蚀电位影响不大;而对调质试样,pH值对Eb影响较大。高频淬火后试样的点蚀电位随外加应力变化可分为三个区:在应力小于50MPa时,点蚀电位随应力增加而急剧下降;在50~400MPa范围,点蚀电位随应力增加而缓慢减小;当应力大于400MPa时,点蚀电位基本趋于稳定。在此基础上提出了1Cr12Ni2W1Mo1V钢在外加应力作用下的钝化膜破裂机理。
应力, 点蚀, 钝化膜
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【期刊论文】Phase transformation and thermal stability of mechanically alloyed W-Ni-Fe composite materials
周敬恩, Zhong-Wu Zhang∗, Jing-En Zhou, Sheng-Qi Xi, Guang Ran, Peng-Liang Li
Materials Science and Engineering A 379(2004)148-153,-0001,():
-1年11月30日
The tungsten heavy alloys with the composition of 93W-4.9Ni-2.1Fe in weight percent from the elemental powders ofW, Ni and Fe were mechanically alloyed (MA-ed). Nano-crystalline supersaturated solid solutions with grain size of 11 nm, and amorphous phase were achieved during MA. By using a combination of differential scanning calorimetry (DSC), X-ray diffraction (XRD) and energy-dispersive X-ray (EDX) analysis, phase transformation and thermal stability of mechanically alloyed 93W-4.9Ni-2.1Fe alloys were investigated. The results show that the melting point of 93W-4.9Ni-2.1Fe alloy milled for 60h decreases approximately by 220℃ compared with the unmilled powderd mixture. When sintered at 1150℃ for 30 min, tungsten heavy alloys using mechanically alloyed powders show homogeneous microstructure and ultra-fine tungsten particles of approximately 2m with high density above 95%. The matrix of tungsten heavy alloys, sintered at 1280℃ for 30 min using MA-ed powders, shows high W solubility about 63.72 wt.% with a large amount of volume fraction of about 0.5 of matrix.
Mechanical alloying, W-Ni-Fe, Solubility, Thermal stability, Microstructure
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【期刊论文】Characterization of RuO2+SnO2/Tianodes with high SnO2-concentrations①
周敬恩, WANG Xin, , TANG Dian, ZHOU Jing-en
Trans. Nonferrous Met. Soc. China Dec. 2004 Vol. 14 No.6,-0001,():
-1年11月30日
Two SnO2+RuO2/Ti anodes with high SnO2-concentrations were prepared by painting, sintering and annealing through a sol2gel technique. The microstructure, morphology and grain size of coatings and the electrochemical properties of the anodes were investigated by XRD, DTA, SEM, TEM and CV. It is demonstrated that the anodic coatings consist of solid solution (Sn, X)O2 (X represents Ru or Ti) phases. The average grain size of the coatings is about less than 30nm. When the annealing temperature increases from 450℃ to 600℃, the solid solutions decompose. The crystal of the coating is equiaxial. The morphol-ogy of TiO2+SnO2/Ti coatings is a mixture of mud2flat cracking with a kind of agglomerated structure.
titanium anode, sol2gel, nanometer coatings
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