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DSC studies on the phase transformation of hydrazonium sulfate 硫酸腙相变的DSC研究
Materials Chemistry Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90063-3
K.C. Patil, J.P. Vittal
{"title":"DSC studies on the phase transformation of hydrazonium sulfate","authors":"K.C. Patil,&nbsp;J.P. Vittal","doi":"10.1016/0390-6035(82)90063-3","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90063-3","url":null,"abstract":"<div><p>The high temperature phase transformation of hydrazonium sulfate, N<sub>2</sub>H<sub>6</sub>SO<sub>4</sub> has been studied using DSC. The enthalpy of phase transition is found to be 3.63 ± 0.1 kJ mole<sup>−1</sup>. The phase transition temperature is found to decrease with the increase of particle size. It appears that the strain energy and not surface energy, is responsible for the phase transformation. The molar volume of the salt increases during the transformation as found by the dilatometric experiment involving percentage of linear thermal expansion. On cooling, the transformation from the high temperature modification to orthorhombic form is incomplete and extends over a wide range of temperature.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 5","pages":"Pages 577-585"},"PeriodicalIF":0.0,"publicationDate":"1982-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90063-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72090760","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
Electrochemical behaviour of hot and cold rolled HSLA steels 热轧和冷轧HSLA钢的电化学行为
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90094-3
S. Tosto, S. Girardi
{"title":"Electrochemical behaviour of hot and cold rolled HSLA steels","authors":"S. Tosto,&nbsp;S. Girardi","doi":"10.1016/0390-6035(82)90094-3","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90094-3","url":null,"abstract":"<div><p>Surface modifications induced by rolling temperature on various HSLA steels are investigated. The main effect of the temperature is the formation of a surface oxide barreer and the diffusion of carbon towards the bulk, leading to the formation of a different steel composition at the surface.</p><p>The consequences of it as concerns some further surface treatments (in particular the phosphatization) are evidenced.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 537-547"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90094-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72091906","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
Effect of a sulfur monolayer on graphite precipitation on cobalt 硫单分子层对钴上石墨析出的影响
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90096-7
F. Pratesi, G. Rovida
{"title":"Effect of a sulfur monolayer on graphite precipitation on cobalt","authors":"F. Pratesi, G. Rovida","doi":"10.1016/0390-6035(82)90096-7","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90096-7","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"32 1","pages":"565-572"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89833362","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
Anwendung der elektroneninterferenz mit der kurzen wellenlänge zur materialprüfung 设计低冲击电子干扰设备进行现场测试
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90097-9
S. Yamaguchi, M. Uda
{"title":"Anwendung der elektroneninterferenz mit der kurzen wellenlänge zur materialprüfung","authors":"S. Yamaguchi, M. Uda","doi":"10.1016/0390-6035(82)90097-9","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90097-9","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"3 1","pages":"573-576"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85351160","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
Analyse directe de l'evolution mecanochimique de systemes “solide-gaz” soumis au broyage 研磨“固体-气体”系统机械化学演化的直接分析
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90089-X
A. Nonat, J.C. Mutin
{"title":"Analyse directe de l'evolution mecanochimique de systemes “solide-gaz” soumis au broyage","authors":"A. Nonat,&nbsp;J.C. Mutin","doi":"10.1016/0390-6035(82)90089-X","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90089-X","url":null,"abstract":"<div><p>An original device for direct analysis of the mechanochemical evolution of solid-gas systems has been developed.</p><p>The volume of gas evolved or occluded during the mechanical reaction is measured under constant gaseous pressure and temperature.</p><p>Grinding experiments have been performed on several hydroxydes and hydrates. They show that this method is very convenient for the systematic study of the thermodynamic and kinetic characteristics of solid-gas reactions carried out either by grinding or by mechanical treatment and subsequent thermolysis.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 455-478"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90089-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72114484","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
Phase equilibria in the MnO-TeO2 system MnO-TeO2体系的相平衡
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90088-8
Y.Y. Ivanova
{"title":"Phase equilibria in the MnO-TeO2 system","authors":"Y.Y. Ivanova","doi":"10.1016/0390-6035(82)90088-8","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90088-8","url":null,"abstract":"<div><p>Glass formation and phase equilibria of the MnO-TeO<sub>2</sub> system in the 0 to 50 mol% MnO range are studied. It is found that the glass-formation region in air is larger than in an inert atmosphere and varies within 10 to 37 mol% MnO.</p><p>The existence of four tellurites of manganese is confirmed and the nature of their melting is established.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 449-453"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90088-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72091908","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
Effect of a sulfur monolayer on graphite precipitation on cobalt 硫单层对钴表面石墨沉淀的影响
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90096-7
F. Pratesi , G. Rovida
{"title":"Effect of a sulfur monolayer on graphite precipitation on cobalt","authors":"F. Pratesi ,&nbsp;G. Rovida","doi":"10.1016/0390-6035(82)90096-7","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90096-7","url":null,"abstract":"<div><p>Carbon segregation followed by graphite formation was studied on a fcc cobalt single crystal, both starting from a clean and a sulfur covered surface. The presence of one monolayer of sulfur atoms was found to affect greatly the graphite formation. In isothermal conditions at high temperatures, the graphite film covers completely the cobalt surface, in any case. However, the time necessary depends on the sulfur coverage and on the surface region. In the most perfect areas of the surface the decrease in the rate of graphite precipitation was found to reach two orders of magnitude.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 565-572"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90096-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72091909","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
La protection du cuivre par siliciuration superficielle 通过表面硅化保护铜
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90093-1
F. Rebuffat, A. Galerie, M. Caillet, J. Besson
{"title":"La protection du cuivre par siliciuration superficielle","authors":"F. Rebuffat,&nbsp;A. Galerie,&nbsp;M. Caillet,&nbsp;J. Besson","doi":"10.1016/0390-6035(82)90093-1","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90093-1","url":null,"abstract":"<div><p>A coating of Cu<sub>5</sub>Si on Cu was prepared by treating copper with monosilane at 700°C and its behaviour in oxygen at high temperature investigated. The protective efficiency of this coating is good as no oxidation could be detected up to 600°C. At higher temperatures, the oxidation scale consists of three layers respectively of Cu<sub>2</sub>O in contact with the metal, SiO<sub>2</sub>, and CuO. The kinetic curves are of sigmoidal type. Their first part corresponds probably to a nucleation process leading to the formation of the silica layer. In the following stages, the reaction rate is assumed to be controlled by the simultaneous diffusion of oxygen and copper through the SiO<sub>2</sub> and CuO layers.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 517-535"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90093-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72091907","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
Raman spectra and structure of GeAsS glasses in the S-rich region 锗的拉曼光谱与结构像富S区的S玻璃
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90091-8
M. Pisárĉik , L. Koudelka
{"title":"Raman spectra and structure of GeAsS glasses in the S-rich region","authors":"M. Pisárĉik ,&nbsp;L. Koudelka","doi":"10.1016/0390-6035(82)90091-8","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90091-8","url":null,"abstract":"<div><p>The Raman spectra of Ge<sub>x</sub>As<sub>y</sub>S<sub>z</sub> glasses have been studied in the ternary composition region of GeS<sub>2</sub>-As<sub>2</sub>-S. Dominant features of the obtained spectra were discussed and the structural units forming the disordered structural network of Ge<sub>x</sub>As<sub>y</sub>S<sub>z</sub> glasses were identified as: GeS<sub>4</sub> tetrahedra, AsS<sub>3</sub> pyramids, As-S-S-As bent chains and S<sub>n</sub> (n = 2–4) chain segments. At high sulfur concentrations a part of the sulfur is dissolved in the structural network in the form of S<sub>8</sub> molecules.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 499-507"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90091-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72114483","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: 23
Utilisation de l'equation de hansch pour l'etablissement de correlations proprietes structures dans le domaine de l'inhibition de corrosion. Role de l'hydrophobie et de la polarite 使用Hansch方程建立缓蚀领域的结构相关特性。疏水性和极性的作用
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90095-5
P. Dupin , A. de Savignac , A. Lattes , B. Sutter , P. Haicour
{"title":"Utilisation de l'equation de hansch pour l'etablissement de correlations proprietes structures dans le domaine de l'inhibition de corrosion. Role de l'hydrophobie et de la polarite","authors":"P. Dupin ,&nbsp;A. de Savignac ,&nbsp;A. Lattes ,&nbsp;B. Sutter ,&nbsp;P. Haicour","doi":"10.1016/0390-6035(82)90095-5","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90095-5","url":null,"abstract":"<div><p>In deaerated media containing hydrogen sulfide, the inhibition of the corrosion of steel by homologous series of aliphatic amines and imidazolines was measured potentiokinetically. The data obtained were correlated successfully to the hydrophobicity and the polarity (calculated parameter) of these molecules by means of Hansch relationship.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 4","pages":"Pages 549-564"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90095-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72091905","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
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