Nanostructured Materials最新文献_第5页

The microstructure of deformed nanocrystalline Ag and Ag/Fe alloy 变形纳米晶Ag和Ag/Fe合金的显微组织

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00422-5

Satoshi Ichikawa , Kun’ichi Miyazawa , Hideki Ichinose , Kunio Ito

引用次数: 10

Comparison of grain size distributions obtained by XRD and TEM in milled FCC powders 用XRD和TEM比较了FCC粉的粒度分布

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00410-9

J. Guerrero-Paz, D. Jaramillo-Vigueras

引用次数: 19

Visible photoluminescence in ion beam mixed SiO2/Si/SiO2 layers SiO2/Si/SiO2混合离子束层的可见光致发光

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00414-6

K.H Chae , J.H Son , G.S Chang , H.B Kim , J.Y Jeong , S Im , J.H Song , K.J Kim , H.K Kim , C.N Whang

引用次数: 13

Properties of the Rayleigh-distribution for particle sizing from SAS experiments SAS实验中颗粒粒度的瑞利分布特性

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00418-3

W. Gille

引用次数: 4

Coercivity of glass-coated Fe73.4-xCu1Nb3.1Si13.4+xB9.1 (0≤x≤1.6) microwires 玻璃涂层Fe73.4-xCu1Nb3.1Si13.4+xB9.1(0≤x≤1.6)微线矫顽力

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00424-9

V Zhukova , A.F Cobeño , A Zhukov , J.M Blanco , V Larin , J Gonzalez

{"title":"Coercivity of glass-coated Fe73.4-xCu1Nb3.1Si13.4+xB9.1 (0≤x≤1.6) microwires","authors":"V Zhukova , A.F Cobeño , A Zhukov , J.M Blanco , V Larin , J Gonzalez","doi":"10.1016/S0965-9773(99)00424-9","DOIUrl":"10.1016/S0965-9773(99)00424-9","url":null,"abstract":"<div>The effects of the geometry, thermal treatment and the amplitude of applied magnetic field on the coercivity behaviour of glass covered Fe73.4-xCu1Nb3.1Si13.4+xB9.1 (x = 0; 1.1 and 1.6) have been investigated. Variations of the coercivity, Hc, with the geometry (d/D ratio, d –diameter of the metallic nucleus, D-total diameter, d/D ranging from 0.1 to 0.9) are attributed mainly to the internal stress acting on the metallic nucleus owing to the glass coating. Annealing temperature (300–700 °C) dependencies of Hc exhibit some peculiar differences with respect to that of the classical FINEMET ribbon, especially in the temperature range of 400–500 °C (very beginning of the nucleation of the nanocrystallization process) and at 650–700 °C (magnetic hardening owing to the iron borides segregation) depending in both cases on ratio d/D. With decreasing of d/D ratio the transition soft-hard magnetic character takes place in a narrower annealing temperature range with a rectangular hysteresis loop of Hc≈2400 A/m. The evolution of Hc with the applied magnetic field amplitude, Ho (<2500 A/m) for the as-prepared and treated at low temperature samples results to be quite linear. This linear behaviour of Hc (Ho) allows to assign a nucleation of domain walls mechanism mainly for the magnetization process connecting with a magnetic bistable behaviour, while the non-linear Hc (Ho) curves of samples with x = 1.6 treated above 650 °C and 700 °C suggest that different mechanism takes place.</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)00424-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80170578","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: 38

Grain growth kinetics in nanostructured nickel 纳米结构镍的晶粒生长动力学

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(00)00427-X

M.C Iordache , S.H Whang , Z Jiao , Z.M Wang

引用次数: 67

Structural stability of titania thin films 二氧化钛薄膜的结构稳定性

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00413-4

P. Gouma, P. Dutta, M. Mills

引用次数: 61

Synthesis of powders and films using a new laser ablation technique 用激光烧蚀新技术合成粉末和薄膜

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00406-7

R Houriet , R Vacassy , H Hofmann

{"title":"Synthesis of powders and films using a new laser ablation technique","authors":"R Houriet , R Vacassy , H Hofmann","doi":"10.1016/S0965-9773(99)00406-7","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00406-7","url":null,"abstract":"<div>A novel method to produce powders and films from ceramic targets is presented. It is shown that the laser spark atomizer (LINA-SPARK™), LSA, combines the advantages of operating at atmospheric pressure and ambient temperature to produce highly uniform films with a web-like structure which can be deposited at relatively high deposition rates (ca. 1 μm·min−1). The preparation of powder particles and coating starting from commercial ceramic specimen (Al2O3) is investigated. Highly agglomerated nanopowders and homogeneous mesoporous coatings forming a web-like structure are prepared using this new technique. The formation of the nanoparticles is explained following a liquefaction process which generates an aerosol, followed by the cooling/solidification of the droplets which results in the formation of a smoke. The general dynamic of both the aerosol and the smoke favors the aggregation process and micrometer-sized fractal-like particles are formed. The laser spark atomizer can be used to produce highly mesoporous thick films. The porosity can be modified by the carrier gas flow rate thus enabling for a control of the microstructure of the coatings which make these nanoparticulate thick films suitable candidates for application in membrane technology, catalysis and lithium ion batteries. ZrO2 and SnO2 nanoparticulate thick films are also synthesized successfully using this new process with quite identical microstructure.</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)00406-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746035","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: 17

Manufacturing and structure investigation of TiN-Al2O3-multilayers tin - al2o3多层膜的制备及结构研究

Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00400-6

H.-D Bauer , B Arnold , K Bartsch , R Rennekamp , A Leonhardt

引用次数: 5

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.H. Shek , X.D. Hu , G.M. Lin , J. Lin

{"title":"Structural relaxation of residual amorphous matrix and modulus oscillation in nanocrystalline FeSiNbCuB ribbons","authors":"C.H. Shek , X.D. 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":"<div>Amorphous Fe73.5Cu1Nb3Si13.5B9 ribbons prepared by melt-spinning were annealed at 500°C for different periods. The dependence on annealing time (t) of the average grain size (d) and volume fraction (Vc) of α-Fe(Si) phase, as well as the Young’s modulus (E) of the ribbons were investigated by X-ray diffraction (XRD) and tensile test, respectively. The grain size of the α-Fe(Si) phase grew in stages with annealing time, exhibiting plateaus between rapid growth periods. The Young’s modulus oscillated with annealing time and the peaks in the E-t curve appeared at the times when grain growth slow down, i.e. the plateau region. The chemical compositions of the amorphous layer surrounding the growing α-Fe(Si) phase and that of the amorphous matrix were estimated. The time taken for the composition equilibration between the amorphous shell ahead of the crystallization front and the amorphous matrix was calculated with Fick’s diffusion equation. The calculated time had the same order of magnitude as that of the period of the staged-growth of the α-Fe(Si) phase. This staged-growth process, controlled by the diffusion of niobium, and the periodical structural relaxation of the amorphous matrix give rise to the oscillating behavior of the E vs. t relationship.</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)00404-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746789","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