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The strain sensitivity coefficients of resistance of rhodium, iridium and Pd20Ag80 铑、铱和Pd20Ag80电阻的应变敏感系数
Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90246-7
Yi-Qun Gao, Li-Zhen Tong, Wego Wang
{"title":"The strain sensitivity coefficients of resistance of rhodium, iridium and Pd20Ag80","authors":"Yi-Qun Gao,&nbsp;Li-Zhen Tong,&nbsp;Wego Wang","doi":"10.1016/0025-5416(88)90246-7","DOIUrl":"10.1016/0025-5416(88)90246-7","url":null,"abstract":"<div><p>The elastic and plastic strain sensitivity coefficients of resistance of rhodium, iridium and the Pd<sub>20</sub>Ag<sub>80</sub> alloy are measured under various annealing and cold- or hot-working conditions. The experimental results are consistent with the theoretical predictions. This work has verified the theory presented in a previous paper. The three-dimensional effective electronic number should be used in the calculation of the elastic strain sensitive coefficient of resistance. In case plastic deformation occurs, the effects on the strain sensitivity coefficient of resistance by elastic deformation diminish and a different formula for plastic deformation should be employed.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90246-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83538892","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
Local evidence for re-entrant magnetic behaviour in amorphous Fe90Zr10 alloys 非晶Fe90Zr10合金重入磁性行为的局部证据
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90293-5
M. Ghafari, W. Keune, R.A. Brand, R.K. Day, J.B. Dunlop
{"title":"Local evidence for re-entrant magnetic behaviour in amorphous Fe90Zr10 alloys","authors":"M. Ghafari,&nbsp;W. Keune,&nbsp;R.A. Brand,&nbsp;R.K. Day,&nbsp;J.B. Dunlop","doi":"10.1016/0025-5416(88)90293-5","DOIUrl":"10.1016/0025-5416(88)90293-5","url":null,"abstract":"<div><p>We report results of <sup>57</sup>Fe Mössbauer measurements on the magnetically concentrated amorphous Fe<sub>90</sub>Zr<sub>10</sub> alloy which give the first evidence of a microscopic origin for the low temperature magnetization anomaly at <em>T</em><sub>f</sub> = 35 K. This is shown by an anomalous increase in the average magnetic hyperfine field <span><math><mtext>B</mtext><msub><mi></mi><mn><mtext>hf</mtext></mn></msub><mtext>(T)</mtext></math></span> below <em>T</em><sub>f</sub>, similar to that observed in crystalline and amorphous re-entrant spin-glass alloys in the concentration range near the percolation threshold.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90293-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73894077","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: 26
Electronic properties and resonant states in AlMn(−Si) alloys AlMn(−Si)合金的电子特性和共振态
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90356-4
C. Berger, D. Pavuna , F. Cyrot-Lackmann, M. Cyrot
{"title":"Electronic properties and resonant states in AlMn(−Si) alloys","authors":"C. Berger,&nbsp;D. Pavuna ,&nbsp;F. Cyrot-Lackmann,&nbsp;M. Cyrot","doi":"10.1016/0025-5416(88)90356-4","DOIUrl":"10.1016/0025-5416(88)90356-4","url":null,"abstract":"<div><p>Detailed experimental studies of quasi-crystalline Al<sub>100−x</sub>Mn<sub>x</sub>(Si) alloys have shown that the magnitude of electrical resistivity as well as the excess specific heat term δγ are proportional to the percentage of manganese in the samples, as is the case in well-known very dilute AlMn alloys. We argue that the excess specific heat term and the high resistivity (about 150–200 μω cm for the quasi-crystalline phase) can be accounted for within the extended Friedel-Anderson s-d model, in which the dominant scattering is due to the hybridization of d electrons with the sp conduction band. Therefore, in our physical picture, the high resistivity in AlMn quasi-crystals is mainly due to the contributions from two effects: the existence of narrow resonant states of manganese at the Fermi level and the existence of correlation lengths of the order of 100–300 Å which cause the incoherence of transport electrons.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90356-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80946986","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
High pressure structural study of quasicrystalline AlMn 准晶AlMn的高压结构研究
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90365-5
E. Johnson, J. Staun Olsen, J.V. Wood, L. Gerward
{"title":"High pressure structural study of quasicrystalline AlMn","authors":"E. Johnson,&nbsp;J. Staun Olsen,&nbsp;J.V. Wood,&nbsp;L. Gerward","doi":"10.1016/0025-5416(88)90365-5","DOIUrl":"10.1016/0025-5416(88)90365-5","url":null,"abstract":"<div><p>High pressure X-ray diffraction studies have been performed on rapidly solidified AlMn alloys (35 and 40 wt.% manganese) containing the quasicrystalline phase. Pressure experiments were undertaken using a diamond anvil cell, and X-ray diffraction analysis in the energy dispersive mode was performed using the synchrotron radiation facility at HASYLAB-DESY in Hamburg. Both the quasicrystalline phase and the AlMn α phase were found to have stable structures for pressures up to 47 GPa and they showed reversible behaviour for decreasing pressures. Using a Murnaghan-type equation of state, the best values of the bulk modulus and its pressure derivative for the icosahedral phase were found to be B<sub>0</sub> = 146 GPa ∓ 10 GPa and B′<sub>0</sub> = 1.7 ∓ 0.5 respectively. The bulk modulus and the pressure derivative for the α phase are B<sub>0</sub> = 85 GPa ∓ 2GPa and B<sub>0</sub><sup>′</sup> = 2.9 ∓ 0.1 respectively.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90365-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76624485","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
Thermal stability of the icosahedral phase in AlMn (Mn=4−15 at.%) alloys prepared by planar flow casting 平面流动铸造AlMn (Mn=4−15 at.%)合金中二十面体相的热稳定性
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90361-8
K. Yu-Zhang, M. Harmelin, A. Quivy, Y. Calvayrac, J. Bigot, R. Portier
{"title":"Thermal stability of the icosahedral phase in AlMn (Mn=4−15 at.%) alloys prepared by planar flow casting","authors":"K. Yu-Zhang,&nbsp;M. Harmelin,&nbsp;A. Quivy,&nbsp;Y. Calvayrac,&nbsp;J. Bigot,&nbsp;R. Portier","doi":"10.1016/0025-5416(88)90361-8","DOIUrl":"10.1016/0025-5416(88)90361-8","url":null,"abstract":"<div><p>A series of AlMn ribbons were prepared by planar flow casting in the range of compositions between 4 and 15 at.% Mn. Their thermal stability was investigated by X-ray diffraction, transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). X-ray diffraction measurements on the as-quenched ribbons showed the presence of a supersaturated Al (Mn) solid solution and the icosahedral phase. The morphology depends on the composition and on the local quenching rate. Several exothermic effects (at least two) were observed on the DSC curves. The temperature and intensity of these effects varied when the manganese content was changed.</p><p>Identification of the individual stages along the DSC curve was carefully followed by stopping the DSC experiment at various points during the exothermic evolution, rapidly cooling the specimen and carrying out the X-ray diffraction measurements and the observations by TEM on the same specimen. It is shown that the thermal stability of the icosahedral phase is greatly influenced by its initial morphology.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90361-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82454639","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
The configurational entropy of two-dimensional random Penrose tilings 二维随机彭罗斯平铺的构型熵
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90353-9
L.C. Chen, F. Spaepen
{"title":"The configurational entropy of two-dimensional random Penrose tilings","authors":"L.C. Chen,&nbsp;F. Spaepen","doi":"10.1016/0025-5416(88)90353-9","DOIUrl":"10.1016/0025-5416(88)90353-9","url":null,"abstract":"<div><p>The configurational entropy of two-dimensional random tilings of Penrose rhombi has been calculated by two methods. Estimating the configurational degeneracy by determining the number of available configurations of each tile during physical model building gave an entropy of 0.495k per tile for a compositionally unconstrained tiling. Geometrical models based on the number of configurations around each vertex without correlations between them, gave higher values.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90353-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88036045","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
Soft magnetic properties of microcrystalline CoFeSiB alloys prepared by sputtering 溅射制备微晶CoFeSiB合金的软磁性能
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90291-1
F.W.A. Dirne, M. Brouha, C.H.M. Witmer, J.L.C. Daams
{"title":"Soft magnetic properties of microcrystalline CoFeSiB alloys prepared by sputtering","authors":"F.W.A. Dirne,&nbsp;M. Brouha,&nbsp;C.H.M. Witmer,&nbsp;J.L.C. Daams","doi":"10.1016/0025-5416(88)90291-1","DOIUrl":"https://doi.org/10.1016/0025-5416(88)90291-1","url":null,"abstract":"<div><p>The magnetic and structural properties of microcrystalline CoFeSiB films prepared by sputtering were studied. This new soft-magnetic material exhibits a high rotational permeability of 1200 combined with a high saturation magnetization of 1.6T. The soft-magnetic properties of this material can be explained by the fact that the thin film consists of f.c.c. crystallites with a perfect &lt;111&gt; texture normal to the film plane. Because of this textyre and the multiple twinning of the crystallites a six-fold symmetry and thus a small inplane anisotropy are obtained.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90291-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91633653","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
Microstructure and soft magnetic properties of rapidly solidified FeAl alloys 快速凝固Fe铝合金的组织与软磁性能
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90299-6
T. Naohara, K. Shinohara, A. Inoue, T. Masumoto, T. Nakamura
{"title":"Microstructure and soft magnetic properties of rapidly solidified FeAl alloys","authors":"T. Naohara,&nbsp;K. Shinohara,&nbsp;A. Inoue,&nbsp;T. Masumoto,&nbsp;T. Nakamura","doi":"10.1016/0025-5416(88)90299-6","DOIUrl":"10.1016/0025-5416(88)90299-6","url":null,"abstract":"<div><p>An attempt has been made to investigate the microstructure and soft magnetic properties of FeAl alloys produced by a rapid solidification technique, with the aim of estimating their aptitude as core elements in rotating machinery. Examinations by optical and transmission electron microscopy revealed that the specimen containing aluminium up to about 23 at.% consists of ductile ferrite, whereas further addition of aluminium gives rise to embrittlement by the formation of an ordered b.c.c. compound. Furthermore, the rapidly solidified alloys exhibited high saturation induction values, more than 1.88 T in the alloys with aluminium content below 10 at.%. For the coercivity behaviour and core loss at 50 Hz, notable improvement was achieved after annealing at elevated temperatures. It was thus concluded that the present alloys have potential for practical use as magnetic core materials in rotating machinery.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90299-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79632279","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
Photoelectron spectroscopy of metallic glasses: Bulk, interface and surface properties 金属玻璃的光电子能谱:体积、界面和表面性质
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90331-X
P. Oelhafen
{"title":"Photoelectron spectroscopy of metallic glasses: Bulk, interface and surface properties","authors":"P. Oelhafen","doi":"10.1016/0025-5416(88)90331-X","DOIUrl":"10.1016/0025-5416(88)90331-X","url":null,"abstract":"<div><p>The investigation of the bulk electronic structure, interface and surface properties of metallic glasses by photoelectron spectroscopy is illustrated by an example of each of these.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90331-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83185185","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
The hall effect in paramagnetic CoZr metallic glasses 顺磁性CoZr金属玻璃中的霍尔效应
Materials Science and Engineering Pub Date : 1988-03-01 DOI: 10.1016/0025-5416(88)90319-9
M.L. Trudeau , R.W. Cochrane, J. Destry
{"title":"The hall effect in paramagnetic CoZr metallic glasses","authors":"M.L. Trudeau ,&nbsp;R.W. Cochrane,&nbsp;J. Destry","doi":"10.1016/0025-5416(88)90319-9","DOIUrl":"10.1016/0025-5416(88)90319-9","url":null,"abstract":"<div><p>We have studied the Hall effect in amorphous paramagnetic Zr<sub>x</sub>Co<sub>100−x</sub> alloys, with 48 ⩽ <em>x</em> ⩽ 80, between 1.5 and 300 K. In these alloys R<sub><em>H</em></sub> shows a very small temperature dependence but a large variation with concentration, being negative in the high cobalt region and positive on the zirconium-rich side. This behaviour, which has also been found in other zirconium-based glasses, cannot be explained classically. By comparison with the ZrFe system we propose that a significant contribution to R<sub><em>H</em></sub> via the side-jump mechanism, as proposed by Berger, has to be considered when trying to explain the behaviour of R<sub><em>H</em></sub> in these ZrCo metallic glasses.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90319-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74646738","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: 12
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