Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material最新文献

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Novel Titanium Particles Reinforced Zr-based Bulk Metallic Glass Composites Prepared by Infiltration Casting 渗铸法制备新型钛颗粒增强zr基大块金属玻璃复合材料
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60095-X
C. M. Zhang, X. Hui, Meiling Wang, Guo-liang Chen
{"title":"Novel Titanium Particles Reinforced Zr-based Bulk Metallic Glass Composites Prepared by Infiltration Casting","authors":"C. M. Zhang, X. Hui, Meiling Wang, Guo-liang Chen","doi":"10.1016/S1005-8850(08)60095-X","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60095-X","url":null,"abstract":"","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"75 1","pages":"505-508"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73511774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heat transfer for Marangoni convection over a vapor-liquid interface due to an imposed temperature gradient 由于施加温度梯度,汽液界面上马兰戈尼对流的传热
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60073-0
Xiaoyan Sheng, Liancun Zheng, Xinxin Zhang
{"title":"Heat transfer for Marangoni convection over a vapor-liquid interface due to an imposed temperature gradient","authors":"Xiaoyan Sheng, Liancun Zheng, Xinxin Zhang","doi":"10.1016/S1005-8850(08)60073-0","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60073-0","url":null,"abstract":"","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"92 1","pages":"385-388"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81476599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Scratch behavior of high speed steels for hot rolls 热轧用高速钢的划痕行为
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60076-6
Li Zhou , Dale Sun , Changsheng Liu , Chunguang Li , Lisong Yao
{"title":"Scratch behavior of high speed steels for hot rolls","authors":"Li Zhou ,&nbsp;Dale Sun ,&nbsp;Changsheng Liu ,&nbsp;Chunguang Li ,&nbsp;Lisong Yao","doi":"10.1016/S1005-8850(08)60076-6","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60076-6","url":null,"abstract":"<div><p>The scratch behaviors of two high speed steels (HSS) for hot rolls were studied by a Micro-combi Tester, and the emphasis was placed on researching the relations between the microstructure and the scratch resistance property of different HSS. The experimental results indicate that during the scratch process, the carbides are embedded into the matrix, the penetration depth of different HSS is closely related with the matrix hardness, <em>i.e</em>., the higher the matrix hardness, the better the scratch resistance property; and in the matrix, the fine, dispersive carbides are beneficial to form steady friction between the indenter and the scratched materials, but the coarser carbides are easier to fall into pieces.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 402-406"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60076-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Cellular automata modelling of phase-change memories 相变记忆的元胞自动机建模
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60084-5
Wanhua Yu, D. Wright
{"title":"Cellular automata modelling of phase-change memories","authors":"Wanhua Yu, D. Wright","doi":"10.1016/S1005-8850(08)60084-5","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60084-5","url":null,"abstract":"","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"25 1","pages":"444-450"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84732661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Fabrication of micro gear wheels by micropowder injection molding 微粉注射成型制造微型齿轮
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60090-0
Haiqing Yin, Xuanhui Qu, Chengchang Jia
{"title":"Fabrication of micro gear wheels by micropowder injection molding","authors":"Haiqing Yin,&nbsp;Xuanhui Qu,&nbsp;Chengchang Jia","doi":"10.1016/S1005-8850(08)60090-0","DOIUrl":"10.1016/S1005-8850(08)60090-0","url":null,"abstract":"<div><p>The micropowder injection molding technology was investigated to fabricate the microsized gear wheels on a conventional injection molding machine. The feedstock comprised of carbonyl ferrum powder and a wax-based thermoplastic binder. Microinjection molding was fulfilled at about 423 K under 100 MPa. The heating system was applied to the die to improve the fluidity of the feedstock and subsequently the cooling system was used to enhance the strength of the green compacts after injection by decreasing the temperature of the die. The gear wheels were realized successfully with their addendum circle diameter ranging from 800 to 200 μm and with the center hole as small as 60 μm.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 480-483"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60090-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87211171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Modeling of microstructure evolution and mechanical properties during hot-strip rolling of Nb steels Nb钢热连轧组织演变及力学性能模拟
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60075-4
Yunbo Xu, Yongmei Yu, Xianghua Liu, Guodong Wang
{"title":"Modeling of microstructure evolution and mechanical properties during hot-strip rolling of Nb steels","authors":"Yunbo Xu,&nbsp;Yongmei Yu,&nbsp;Xianghua Liu,&nbsp;Guodong Wang","doi":"10.1016/S1005-8850(08)60075-4","DOIUrl":"10.1016/S1005-8850(08)60075-4","url":null,"abstract":"<div><p>An integrated metallurgical model was developed for Nb steels to predict the microstructure evolution and mechanical properties during the hot-strip rolling and cooling process. On the basis of the industrial data, the transformation kinetics, strength, and elongation rate were evaluated for different chemical compositions and processing parameters. The yield strength and tensile strength increase with increasing Nb content or decreasing finishing temperature. The bainite distributed in finer ferrite matrix, which is produced at relatively low coiling temperatures, can greatly increase the strength of steel, especially tensile strength, thereby decreasing the yield ratio. A reasonable agreement was found between the predicted and measured results. It indicates that the present models can be used to simulate the actual production process.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 396-401"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60075-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76208370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Anticorrosion performance of the coating/metal system by electrochemical impedance spectra 电化学阻抗谱法研究涂层/金属体系的防腐性能
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60086-9
Yinghuai Zhang, Lining Xu, Minxu Lu, Pu Zhang
{"title":"Anticorrosion performance of the coating/metal system by electrochemical impedance spectra","authors":"Yinghuai Zhang,&nbsp;Lining Xu,&nbsp;Minxu Lu,&nbsp;Pu Zhang","doi":"10.1016/S1005-8850(08)60086-9","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60086-9","url":null,"abstract":"<div><p>In order to investigate the anticorrosion performance of the organic coating/metal system, electrochemical impedance spectra (EIS) were measured in the 3.5wt% NaCl solution, the chemical component and the formation of corrosion products scale were analyzed by laser Raman microspectroscopy, and the pattern of the organic coating/metal system was observed by scanning electron microscopy (SEM). The characteristics and the delamination process of the organic coating/metal system were investigated systematically, and the emphases were on the transportation of the corrosive medium and the changes of the coating/metal interface. The results show that the impedance decreases at the initial immersion, then increases at the middle-immersion, and again decreases at last, which is related to the corrosion products scale. The concentration of Cl<sup>−</sup> in the coating, which destroys the corrosion products scale, increases with the immersion time.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 457-460"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60086-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Preparation of natural brucite nanofibers by the dispersion method 分散法制备天然水镁石纳米纤维
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60092-4
Li Xu , Wen Ni , Wenping Li , Xingde Liu , Hailong Yang , Xiaoguang Yang
{"title":"Preparation of natural brucite nanofibers by the dispersion method","authors":"Li Xu ,&nbsp;Wen Ni ,&nbsp;Wenping Li ,&nbsp;Xingde Liu ,&nbsp;Hailong Yang ,&nbsp;Xiaoguang Yang","doi":"10.1016/S1005-8850(08)60092-4","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60092-4","url":null,"abstract":"<div><p>The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate (OT) as the dispersant at a dispersant/fiber mass ratio of 0.15:1, dispersing for 30 min at a water/solid mass ratio of 20:1. The prepared nanofibers were characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). It is shown that the prepared single brucite nanofiber is around 30 nm in diameter and the talus of the nonsingle brucite nanofibers is about 50-150 nm in diameter. Natural brucite mineral fibers were treated by the dispersion method to obtain nanomaterials. These fibers have significant advantages over artificial nanofibers both in yield and in cost.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 489-494"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60092-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Corrosion damage evolution and residual strength of corroded aluminum alloys 腐蚀铝合金的腐蚀损伤演化与残余强度
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60081-X
Youhong Zhang , Guozhi Lv , Hui Wang , Bomei Si , Yueliang Cheng
{"title":"Corrosion damage evolution and residual strength of corroded aluminum alloys","authors":"Youhong Zhang ,&nbsp;Guozhi Lv ,&nbsp;Hui Wang ,&nbsp;Bomei Si ,&nbsp;Yueliang Cheng","doi":"10.1016/S1005-8850(08)60081-X","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60081-X","url":null,"abstract":"<div><p>The LY12CZ aluminum alloy specimens were corroded under the conditions of different test temperatures and exposure durations. After corrosion exposure, fatigue tests were performed. Scanning electron microscopy and optical microscope analyses on corrosion damage were carried out. The definition of surface corrosion damage ratio was provided to describe the extent of surface corrosion damage. On the basis of the measured data sets of the corrosion damage ratio, the probabilistic model of corrosion damage evolution was built. The corrosion damage decreased the fatigue life by a factor of about 1.25 to 2.38 and the prediction method of residual strength of the corroded structure was presented.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 430-433"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60081-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Prediction of yttrium, lanthanum, cerium, and neodymium leaching recovery from apatite concentrate using artificial neural networks 应用人工神经网络预测磷灰石精矿中钇、镧、铈和钕的浸出回收率
Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60070-5
E. Jorjani, A.H. Bagherieh, Sh. Mesroghli, S. Chehreh Chelgani
{"title":"Prediction of yttrium, lanthanum, cerium, and neodymium leaching recovery from apatite concentrate using artificial neural networks","authors":"E. Jorjani,&nbsp;A.H. Bagherieh,&nbsp;Sh. Mesroghli,&nbsp;S. Chehreh Chelgani","doi":"10.1016/S1005-8850(08)60070-5","DOIUrl":"10.1016/S1005-8850(08)60070-5","url":null,"abstract":"<div><p>The assay and recovery of rare earth elements (REEs) in the leaching process is being determined using expensive analytical methods: inductively coupled plasma atomic emission spectroscopy (ICP-AES) and inductively coupled plasma mass spectroscopy (ICP-MS). A neural network model to predict the effects of operational variables on the lanthanum, cerium, yttrium, and neodymium recovery in the leaching of apatite concentrate is presented in this article. The effects of leaching time (10 to 40 min), pulp densities (30% to 50%), acid concentrations (20% to 60%), and agitation rates (100 to 200 r/min), were investigated and optimized on the recovery of REEs in the laboratory at a leaching temperature of 60°C. The obtained data in the laboratory optimization process were used for training and testing the neural network. The feed-forward artificial neural network with a 4-5-5-1 arrangement was capable of estimating the leaching recovery of REEs. The neural network predicted values were in good agreement with the experimental results. The correlations of <em>R</em>=1 in training stages, and <em>R</em>=0.971, 0.952, 0.985, and 0.98 in testing stages were a result of Ce, Nd, La, and Y recovery prediction respectively, and these values were usually acceptable. It was shown that the proposed neural network model accurately reproduced all the effects of the operation variables, and could be used in the simulation of a leaching plant for REEs.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 367-374"},"PeriodicalIF":0.0,"publicationDate":"2008-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60070-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83669394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
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