Surface Technology最新文献_第9页

Study of the adsorption characterictics and pore structure of activated carbons 活性炭的吸附特性及孔结构研究

Surface Technology Pub Date : 1985-05-01 DOI: 10.1016/0376-4583(85)90052-4

K. Kutics, L. Kotsis, J. Argyelán, P. Szolcsányi

引用次数: 1

Monostructural and spectral investigations of the mechanism of surface layer formation during the oxidation of hot-pressed Si3N4 in air at high temperatures 热压氮化硅在空气中高温氧化过程中表面层形成机制的单结构和光谱研究

Surface Technology Pub Date : 1985-05-01 DOI: 10.1016/0376-4583(85)90051-2

M.M.Abou Sekkina, M.M.A. Goda, M. Rashad, S.B. Hanna

{"title":"Monostructural and spectral investigations of the mechanism of surface layer formation during the oxidation of hot-pressed Si3N4 in air at high temperatures","authors":"M.M.Abou Sekkina, M.M.A. Goda, M. Rashad, S.B. Hanna","doi":"10.1016/0376-4583(85)90051-2","DOIUrl":"10.1016/0376-4583(85)90051-2","url":null,"abstract":"<div>Hot-pressed silicon nitride specimens containing magnesia additives were prepared and oxidized in air at high temperatures. The oxidized specimens were examined using a scanning electron microscope. The electronic and IR absorption spectra were measured. The scanning electron microscopy results indicated a decrease in the grain size with increasing intergranular area. The grain boundaries become sharper with increasing oxidation temperature and magnesia content. The sharpness of the grain boundaries is due to high temperature thermal etching effects. Electronic and IR absorption spectra revealed band broadening, a slight shift towards longer wavelength and the appearance of new bands as a function of MgO content and firing temperature. In conformity with all the present data, this could also be correlated with the decreased degree of crystallinity, the enlargement of the intergranular areas and the formation and propagation of oxidation products. In the oxidation mechanism additive and impurity cations diffuse outwards from the glassy phase in the bulk Si3N4 through the oxide film. The driving force is the formation of a reaction couple between the surface silica and the phase containing bulk magnesia and impurities.</div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 1","pages":"Pages 77-85"},"PeriodicalIF":0.0,"publicationDate":"1985-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90051-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77337512","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

Change in the etch pit morphology of bismuth with temperature 铋的蚀坑形貌随温度的变化

Surface Technology Pub Date : 1985-05-01 DOI: 10.1016/0376-4583(85)90049-4

M.J. Joshi, B. Shah

引用次数: 0

The banded structure of Ni-P electrodeposits 镍磷电镀层的带状结构

Surface Technology Pub Date : 1985-05-01 DOI: 10.1016/0376-4583(85)90043-3

C.C. Nee, R. Weil

引用次数: 26

Electrodeposition of antimony and antimony alloys— A review 锑及锑合金的电沉积研究进展

Surface Technology Pub Date : 1985-04-01 DOI: 10.1016/0376-4583(85)90053-6

Y.N. Sadana, J.P. Singh, R. Kumar

引用次数: 28

Plant extracts as corrosion inhibitors of mild steel in HCl solutions 植物提取物对低碳钢在盐酸溶液中的缓蚀作用

Surface Technology Pub Date : 1985-04-01 DOI: 10.1016/0376-4583(85)90057-3

Fabrizio Zucchi , Ibrahim Hashi Omar

引用次数: 132

Structures of hydrided palladium at interfaces: Evidence of subsurface quasi-β(α') phase hydride formation at very low hydrogen chemical potentials at 25 °C 界面处氢化钯的结构:在25°C非常低的氢化学势下，地下准β(α′)相氢化物形成的证据

Surface Technology Pub Date : 1985-04-01 DOI: 10.1016/0376-4583(85)90054-8

F.A. Lewis, S.G. McKee

引用次数: 6

Étude de la diffusion dans un système multiphasé appliqué à l'aluminisation du fer et des aciers 应用于铁和钢铝化的多相体系中的扩散研究

Surface Technology Pub Date : 1985-04-01 DOI: 10.1016/0376-4583(85)90055-X

B. Nciri , L. Vandenbulcke

引用次数: 5

Inhibition by amino acids of the corrosion of steel in acid 氨基酸对钢在酸中的腐蚀的抑制作用

Surface Technology Pub Date : 1985-04-01 DOI: 10.1016/0376-4583(85)90056-1

B.A. Abd-El-Nabey, N. Khalil, A. Mohamed

引用次数: 32

Effect of some anions on the anodic dissolution of Delta-52 steel in sulphuric acid solutions 某些阴离子对Delta-52钢在硫酸溶液中阳极溶解的影响

Surface Technology Pub Date : 1985-03-01 DOI: 10.1016/0376-4583(85)90074-3

S.S. Abd El Rehim, M.Sh. Shalaby, S.M. Abd El Haleem

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引用次数: 3