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The effect of Ni on the cryogenic attritor milling of Metglas Fe78B13Si9 Ni对meglas Fe78B13Si9低温磨耗器铣削的影响
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(00)00428-1
Baoquan Huang, H. Jiang, R. Perez, S. Nutt, E. Lavernia
{"title":"The effect of Ni on the cryogenic attritor milling of Metglas Fe78B13Si9","authors":"Baoquan Huang, H. Jiang, R. Perez, S. Nutt, E. Lavernia","doi":"10.1016/S0965-9773(00)00428-1","DOIUrl":"https://doi.org/10.1016/S0965-9773(00)00428-1","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77660933","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
Impedance spectroscopic analysis of AC response of nanophase ZnO and ZnO-Al2O3 nanocomposites 纳米相ZnO和ZnO- al2o3纳米复合材料交流响应的阻抗谱分析
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00399-2
Joshy Jose , M.Abdul Khadar
{"title":"Impedance spectroscopic analysis of AC response of nanophase ZnO and ZnO-Al2O3 nanocomposites","authors":"Joshy Jose ,&nbsp;M.Abdul Khadar","doi":"10.1016/S0965-9773(99)00399-2","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00399-2","url":null,"abstract":"<div><p><span>Nanoparticles of ZnO and Al</span><sub>2</sub>O<sub>3</sub> were prepared by chemical arrested precipitation. The average particle size was determined from x-ray line broadening and TEM. The ac electrical response of the consolidated nanoparticles of ZnO and ZnO-Al<sub>2</sub>O<sub>3</sub><span> nanocomposites was studied using impedance spectroscopic technique. The equivalent circuit parameters were determined by computer simulation. The grain and grain boundary contributions to the conductivity were determined and the difference in the conductivity was attributed to the grain boundary properties of nanomaterials. The variation in conductivity of nanocomposites with weight percentage of Al</span><sub>2</sub>O<sub>3</sub><span> was attributed to the change in interfacial defect structure<span>, band structure modifications and compensation of oxygen vacancies.</span></span></p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00399-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746238","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: 57
Local icosahedral symmetries in Al-Mo alloys prepared by ball milling 球磨制备Al-Mo合金的局部二十面体对称性
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00416-X
M Monagheddu , F Delogu , L Schiffini , R Frattini , S Enzo
{"title":"Local icosahedral symmetries in Al-Mo alloys prepared by ball milling","authors":"M Monagheddu ,&nbsp;F Delogu ,&nbsp;L Schiffini ,&nbsp;R Frattini ,&nbsp;S Enzo","doi":"10.1016/S0965-9773(99)00416-X","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00416-X","url":null,"abstract":"<div><p>Annealing products of mechanically treated Al<sub>75</sub>Mo<sub>25</sub><span> powders have been studied by X-ray powder diffraction with the Rietveld method. The differential scanning calorimetry<span> traces of as-milled powders showed transformation features whose temperature decreased as a function of mechanical treatment time. Different phases were identified across the calorimetric events, which were also reported in the high-temperature phase diagram of the Al-Mo system, such as Al</span></span><sub>12</sub>Mo, Al<sub>5</sub>Mo, Al<sub>4</sub>Mo, Al<sub>3</sub>Mo and Al<sub>22</sub>Mo<sub>5</sub><span>. Nevertheless, the solid state transformation processes activated in the calorimeter at ambient pressure are of different nature with respect to those observed by means of neutron diffraction during in situ annealing under vacuum. In the specimen mechanically alloyed for 32 hours the Al</span><sub>12</sub>Mo phase was observed after annealing with both processes. In the crystal geometry of Al<sub>12</sub>Mo, which is regarded as a first order approximation of the quasi-crystalline phase, the molybdenum atoms are arranged in a BCC fashion and are surrounded icosahedrally by twelve aluminum atoms.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00416-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746579","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: 8
Nanocorundum—advanced synthesis and processing 纳米刚玉——先进的合成与加工
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00405-5
A Krell , H Ma
{"title":"Nanocorundum—advanced synthesis and processing","authors":"A Krell ,&nbsp;H Ma","doi":"10.1016/S0965-9773(99)00405-5","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00405-5","url":null,"abstract":"<div><p>Inorganic and organic approaches for the synthesis of nanocorundum powders and products are described on a scale of 50 g batches. The median particle size of the volume distribution of redispersed powders is about 50 nm after calcination<span> at T &lt; 950 °C. A key issue of advanced processing is the preparation of dense sintered bodies at a sintering temperature<span> &lt; 1300 °C with a submicrometer grain size; the bodies are large enough to enable the measurement of a Vickers macrohardness &gt; 21 GPa at a testing load of 10 kg. Porous sintered corundum bodies with an average pore size between 15 and 60 nm and a porosity of about 40–55% have been produced within the framework of the described synthesis by both powder or sol/gel technologies for the use as chemically highly stable filtration membranes or as catalyst supports. Other applications are amorphous or crystalline nanoporous products with average pore sizes of about 1 nm.</span></span></p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00405-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746790","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: 24
Processing, microstructure and mechanical properties of 25 vol% YAG-Al2O3 nanocomposites 25 vol% YAG-Al2O3纳米复合材料的制备、显微组织和力学性能
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00396-7
W. Li, L. Gao
{"title":"Processing, microstructure and mechanical properties of 25 vol% YAG-Al2O3 nanocomposites","authors":"W. Li, L. Gao","doi":"10.1016/S0965-9773(99)00396-7","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00396-7","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81441045","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: 58
Soft magnetic properties of nanocrystalline Ni3Fe and Fe75Al12.5Ge12.5 纳米晶Ni3Fe和Fe75Al12.5Ge12.5的软磁性能
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(00)00430-X
H. Frase, R. Shull, L. Hong, T. A. Stephens, Z. Gao, B. Fultz
{"title":"Soft magnetic properties of nanocrystalline Ni3Fe and Fe75Al12.5Ge12.5","authors":"H. Frase, R. Shull, L. Hong, T. A. Stephens, Z. Gao, B. Fultz","doi":"10.1016/S0965-9773(00)00430-X","DOIUrl":"https://doi.org/10.1016/S0965-9773(00)00430-X","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77970772","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: 20
Surfaces of doped nanophase cerium oxide catalysts 掺杂纳米相氧化铈催化剂的表面
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(00)00431-1
A. Palmqvist, M. Wirde, U. Gelius, M. Muhammed
{"title":"Surfaces of doped nanophase cerium oxide catalysts","authors":"A. Palmqvist, M. Wirde, U. Gelius, M. Muhammed","doi":"10.1016/S0965-9773(00)00431-1","DOIUrl":"https://doi.org/10.1016/S0965-9773(00)00431-1","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88021105","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: 86
Structural relaxation of residual amorphous matrix and modulus oscillation in nanocrystalline FeSiNbCuB ribbons 纳米晶FeSiNbCuB带中残余非晶基体的结构松弛和模量振荡
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00404-3
C. Shek, X. Hu, G. M. Lin, J. Lin
{"title":"Structural relaxation of residual amorphous matrix and modulus oscillation in nanocrystalline FeSiNbCuB ribbons","authors":"C. Shek, X. Hu, G. M. Lin, J. Lin","doi":"10.1016/S0965-9773(99)00404-3","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00404-3","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86050562","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: 2
Preparation and characterization of nanosized TiO2 powders from aqueous TiCl4 solution 二氧化钛纳米粉体的制备及表征
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00421-3
Q.-H. Zhang , L. Gao , J.-K Guo
{"title":"Preparation and characterization of nanosized TiO2 powders from aqueous TiCl4 solution","authors":"Q.-H. Zhang ,&nbsp;L. Gao ,&nbsp;J.-K Guo","doi":"10.1016/S0965-9773(99)00421-3","DOIUrl":"10.1016/S0965-9773(99)00421-3","url":null,"abstract":"<div><p>A solution-based processing method has been used to synthesize nanocrystalline TiO<sub>2</sub> powders by controlling the hydrolysis of TiCl<sub>4</sub><span> in aqueous solution. As-prepared powder was characterized by TEM<span>, HREM, XRD, BET and ED techniques. In the presence of a small amount sulphate ions, the powder was pure anatase and its primary particle size is finer than that of alkoxide-derived powder, moreover the transformation of anatase to rutile was retarded. Both hydrolysis temperature and amount of sulfate ions had effects on the morphology and crystallization of the powder. In an optimum process, TiO</span></span><sub>2</sub><span> powder in the anatase phase was fabricated without calcination and its primary size was 4nm, BET surface area was 290m</span><sup>2</sup>/g.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00421-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77378448","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: 86
Mechanical alloying of the Ti-Al system in atmosphere of hydrogen and argon 氢、氩气氛下Ti-Al体系的机械合金化
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00411-0
A. Takasaki, Y. Furuya
{"title":"Mechanical alloying of the Ti-Al system in atmosphere of hydrogen and argon","authors":"A. Takasaki, Y. Furuya","doi":"10.1016/S0965-9773(99)00411-0","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00411-0","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76739657","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: 20
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