Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material最新文献_第10页

Adhesive strength of CVD diamond thin films quantitatively measured by means of the bulge and blister test 用鼓泡试验定量测定了CVD金刚石薄膜的粘接强度

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60089-4

Daohui Xiang , Ming Chen , Yuping Ma , Fanghong Sun

引用次数: 3

Electrochemical behaviors of silicon wafers in silica slurry 硅片在硅浆中的电化学行为

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60093-6

Xiaolan Song , Haiping Yang , Xunda Shi , Xi He , Guanzhou Qiu

引用次数: 4

Effects of correlative factors on the interdendritic melt flow brought by the bulge in continuous casting slabs 相关因素对连铸坯鼓包引起枝晶间熔体流动的影响

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60077-8

Shuying Chen , Guowei Chang , Jianzhong Wang , Chunjing Wu

引用次数: 3

Microstructure, cold rolling, heat treatment, and mechanical properties of Mg-Li alloys 镁锂合金的组织、冷轧、热处理和力学性能

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60083-3

Haibin Ji, Guangchun Yao, Hongbin Li

{"title":"Microstructure, cold rolling, heat treatment, and mechanical properties of Mg-Li alloys","authors":"Haibin Ji, Guangchun Yao, Hongbin Li","doi":"10.1016/S1005-8850(08)60083-3","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60083-3","url":null,"abstract":"<div>The magnesium-lithium (Mg-Li) alloy exhibits two phase structures between 5.7wt% and 10.3wt% Li contents, consisting of the α (hcp) Mg-rich and the β (bcc) Li-rich phases, at room temperature. In the experiment, Mg-5Li-2Zn, Mg-9Li-2Zn, Mg-16Li-2Zn, Mg-22Li-2Zn, Mg-5Li-2Zn-2Ca, Mg-9Li-2Zn-2Ca, Mg-16Li-2Zn-2Ca, and Mg-22Li-2Zn-2Ca (wt%) were melted. During the melting process, the flux, which was composed of lithium chloride (LiCl) and lithium fluoride (LiF) in the proportion of 3:1 (mass ratio) and argon gas were used to protect the alloys from oxidation. The microstructure, mechanical properties, and cold-rolling workability of the wrought alloys were studied. The crystal grain of the alloys (adding Ga) is fine. The hardness of the studied alloys decreases with an increase in element Li. The density of the studied alloys is in the range of 1.187 to 1.617 g/cm3. The reduction of the Mg-16Li-2Zn and Mg-22Li-2Zn alloys can exceed 85% at room temperature. The Mg-9Li-2Zn-2Ca alloy was heat treated at 300°C for 8, 12, 16, and 24 h, respectively. The optimum heat treatment of the Mg-9Li-2Zn-2Ca alloy is 300°C×12h by metallographic observation and by studying the mechanical properties of the alloys.</div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 440-443"},"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)60083-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282366","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

Texture of deformed Cu-Cr-Zr alloys 变形Cu-Cr-Zr合金的织构

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60082-1

Huaqing Li , Shuisheng Xie , Xujun Mi , Pengyue Wu , Yanfeng Li

{"title":"Texture of deformed Cu-Cr-Zr alloys","authors":"Huaqing Li , Shuisheng Xie , Xujun Mi , Pengyue Wu , Yanfeng Li","doi":"10.1016/S1005-8850(08)60082-1","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60082-1","url":null,"abstract":"<div>The influences of plastic deformation, aging treatment, and alloying elements on the texture of Cu-Cr-Zr alloys were explored. The texture component and intensity of Cu-Cr-Zr alloys under various working conditions after aging treatment were characterized using the orientation distributing function (ODF). The influence of Zr content on the texture of Cu-Cr-Zr alloys was also analyzed. The reduction pass and deformation level were primary factors influencing the texture. Rolling texture appeared in a rolled plate and the fibrous textures of {111} and {001} were detected after 80% deformation. Fibrous texture with a main constituent of {111} improved the tensile strength of the alloy wire. The texture contents of {110}<331> and {110}<112> were predominated, whereas, those of {113}<332> and {112}<111> were in the minority in the Cu-Cr-Zr alloy with a higher Zr content (>0.5wt%). However, in the samples with a lower Zr content (<0.1wt%), the texture contents of {113}<332>, {112}<111>, and {111}<110> were in the majority.</div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 434-439"},"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)60082-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282369","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

Desulfurizer desulphurization kinetics by the injection method 注射法脱硫剂的脱硫动力学

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60071-7

Wei Wu, Zhijun Han, Yan-bin Hu

引用次数: 4

Structure and electrochemical properties of La, F dual-doped iLa0.01Mn1.99O3.99F0.01 cathode materials La，F双掺杂iLa0.01Mn1.99O3.99F0.01阴极材料的结构和电化学性能

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60088-2

Meng Chen, Shengjun Li, Chuang Yang

{"title":"Structure and electrochemical properties of La, F dual-doped iLa0.01Mn1.99O3.99F0.01 cathode materials","authors":"Meng Chen, Shengjun Li, Chuang Yang","doi":"10.1016/S1005-8850(08)60088-2","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60088-2","url":null,"abstract":"<div>The cathode materials LiMn2O4 and rare earth elements La-doped or La and F dual-doped spinel lithium manganese oxides were synthesized by the citric acid-assisted sol-gel method. The synthesized samples were investigated by differential thermal analysis (DTA) and thermogravimetry (TG) measurements, X-ray diffraction (XRD), scanning electronic microscope (SEM), cyclic voltammetry (CV), and charge-discharge test. XRD data shows that all the samples exhibit the same pure spinel phase, and the LiLa0.01Mn1.99O3.99F0.01 and LiLa0.01Mn1.99O4 samples have smaller lattice parameters and unit cell volume than LiMn2O4. SEM indicates that LiLa0.01Mn1.99O3.99F0.01 has a slightly smaller particle size and a more regular morphology structure with narrow size distribution. The charge-discharge test reveals that the initial capacities of LiMn2O4, LiLa0.01Mn1.99O4, and LiLa0.01Mn1.99O3.99F0.01 are 129.9, 122.8, and 126.4 mAh·g−1, and the capacity losses of the initial values after 50 cycles are 14.5%, 7.6%, and 8.0%, respectively. The CVs show that the La and F dual-doped spinel displays a better reversibility than LiMn2O4.</div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 468-473"},"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)60088-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282185","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: 7

Changes of crystallinity and spherulite morphology in isotactic polypropylene after rolling and heat treatment 全同立构聚丙烯轧制和热处理后结晶度和球晶形态的变化

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60097-3

Juan Jia , Weimin Mao , Dierk Raabe

{"title":"Changes of crystallinity and spherulite morphology in isotactic polypropylene after rolling and heat treatment","authors":"Juan Jia , Weimin Mao , Dierk Raabe","doi":"10.1016/S1005-8850(08)60097-3","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60097-3","url":null,"abstract":"<div>The spherulite morphology of the rolled and subsequent heat-treated isotactic polypropylene (iPP) was observed by polarized microscopy, and the crystallinity evolution of materials was also measured by the wide angle X-ray scattering (WAXS). Rolling led to the oblate spherulites in the deformed iPP samples. The sheared crystalline lamellae broke apart into sets of crystalline blocks during rolling. As a result, the crystallinity of the iPP samples was greatly reduced during deformation, which induced the unclear spherulites and spherulite boundaries. Subsequent heat treatment resulted in the strong recrystallization of the rolled iPP samples. But the recrystallization in this work only meant the rearrangement of the macromolecule along the unbroken crystalline lamellae and the existing small crystalline blocks in the deformed spherulites. Heat treatment did not change the shape of the spherulites formed during deformation. The recrystallization also resulted in very clear spherulites and spherulite boundaries.</div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 514-520"},"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)60097-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282192","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

Heat transfer for Marangoni convection over a vapor-liquid interface due to an imposed temperature gradient 由于施加的温度梯度，Marangoni对流在气液界面上的传热

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

引用次数: 1

Precipitation characteristic of high strength steels microalloyed with titanium produced by compact strip production 紧凑型带钢生产钛微合金化高强度钢的析出特性

Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Pub Date : 2008-08-01 DOI: 10.1016/S1005-8850(08)60074-2

Jian Zhou , Yonglin Kang , Xinping Mao

{"title":"Precipitation characteristic of high strength steels microalloyed with titanium produced by compact strip production","authors":"Jian Zhou , Yonglin Kang , Xinping Mao","doi":"10.1016/S1005-8850(08)60074-2","DOIUrl":"https://doi.org/10.1016/S1005-8850(08)60074-2","url":null,"abstract":"<div>Transmission electron microscopy (TEM) and physics-chemical phase analysis were employed to investigate the precipitates in high strength steels microalloyed with Ti produced by compact strip production (CSP). It was seen that precipitates in Ti microalloyed steels mainly included TiN, Ti4C2S2, and TiC. The size of TiN particles varied from 50 to 500 nm, and they could precipitate during or before soaking. The Ti4C2S2 with the size of 40-100 nm might precipitate before rolling, and the TiC particles with the size of 5-50 nm precipitated heterogeneously. High Ti content would lead to the presence of bigger TiC particles that precipitated in austenite, and by contrast, TiC particles that precipitated in ferrite and the transformation of austenite to ferrite was smaller. They were less than 30 nm and mainly responsible for precipitate strengthening. It should be noted that the TiC particles in higher Ti content were generally smaller than those in the steel with a lower Ti content.</div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":"15 4","pages":"Pages 389-395"},"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)60074-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72282198","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: 7