ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hits 11 - 12 | 12 hits

Sorting

Electronic Resource

Surface and microanalytical studies on the corrosion of a Ti5Ta alloy in concentrated nitric acidIn this paper, % means always mass %. (1990)

Eickmans, J. ; Holm, R. ; Müller, G. ; [et al.]

Chichester [u.a.] : Wiley-Blackwell

Surface and Interface Analysis 16 (1990), S. 265-270

add to mindlist on the mindlist

Details

ISSN: 0142-2421

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Physics

Notes: The Ti5Ta alloy shows interesting corrosion behaviour and is becoming technologically important, e.g. for chemical plant construction. Welding and further mechanical tests gave good mechanical properties. Therefore, the corrosion of this alloy was studied in comparison with the corrosion of unalloyed Ti and Ta. The samples were corroded for up to 24 days in hot 67.5% nitric acid.The resulting surface layers were investigated with SEM, transmission electron microscopy (TEM), energy dispersive x-ray microanalyses (EDX), AES and sputtered neutral mass spectrometry (SNMS). Under these conditions, the oxide growth seems to be dependent on the orientation of the crystallites at the surface, which was not observed under milder attack. When Ti5Ta samples were immersed for 5 days in boiling HNO3, the oxide layer was ∼300 nm thick and a particular crack pattern developed on some grains during drying in air at room temperature. This was observed only for oxide layers thicker than 300 nm.After corroding Ti5Ta in boiling HNO3 we observed a TaTi atomic ratio of up to 1:1 using ESCA and up to 5 μm thick Ta oxide-rich scales. The selected area diffraction pattern in the TEM indicates that the oxide film may contain mixed Ti/Ta oxides. The extraordinary Ta oxide enrichment, which is due to the selective dissolution process of Ti, is believed to cause the good corrosion resistance of the alloy. It was not observed after heat treatment in air up to 800 °C or after corrosion tests in HNO3 at room temperature.

Additional Material: 8 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/sia.740160156

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Oligomercharakterisierung bei der Strukturbildung diolmodifizierter Epoxide mittels GPC, FTIR und 13C-NMR (1990)

Schlothauer, K. ; Müller, G. ; Fedtke, M.

Weinheim : Wiley-Blackwell

Acta Polymerica 41 (1990), S. 433-438

add to mindlist on the mindlist

Details

ISSN: 0323-7648

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Description / Table of Contents: Solutions and low molecular fractions of the reaction products of thermosetting epoxides based on bisphenol-A-diglycidylether (BADGE) and butane-1,4-diol (BD) with Mg(ClO4)2. 2H2O as accelerator were investigated by means of GPC, FTIR, and high resolution 13C-NMR. Conclusions concerning the development of the structure were drawn.

Notes: Mittels GPC, FTIR und hochauflösender 13C-NMR wurden Lösungen sowie niedermolekulare Fraktionen der bei der Heißhärtung von Epoxiden auf der Basis von Bisphenol-A-Diglycidethern (BADGE) mit Butan-1,4-Diol (BD) in Gegenwart von Mg(ClO4)2. 2H2O als Beschleuniger entstehenden Reaktionsprodukte untersucht und Aussagen über die Strukturbildung getroffen.

Additional Material: 6 Ill.