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Digitale Medien

Crack Propagation Behavior at Sn37Pb-Copper Interface in Low Cycle Fatigue (2007)

Sakane, Masao ; Itoh, Kazuhiro ; Tsukada, Yutaka ; [weitere]

s.l. ; Stafa-Zurich, Switzerland

Key engineering materials Vol. 353-358 (Sept. 2007), p. 2962-2965

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ISSN: 1013-9826

Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Thema: Maschinenbau

Notizen: This paper studies the crack propagation at Sn37Pb-copper interface in push-pull lowcycle fatigue. Bonded specimens of Sn37Pb and copper having notch holes with different distancesfrom the interface were fatigued at 313K and the crack propagation paths were observed. Crackspropagated at the interface when the notch hole was near the interface but propagated in the solderwhen the notch hole was away from the interface. The propagation rate of the interfacial crack wasfaster than that of non-interface crack. The crack path and crack propagation rate of the two typesof cracks were discussed in relation to J integral range calculated by finite element method

Materialart: Digitale Medien

URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2962.pdf

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Digitale Medien

Thermal treatment for immobilization of chiral polysiloxanes in capillary gas chromatography (1996)

Abe, Iwao ; Terada, Kenji ; Nakahara, Taketoshi

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 19 (1996), S. 91-94

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ISSN: 0935-6304

Schlagwort(e): Chiral selector anchored to polysiloxane ; Chiral phase capillary GC ; Immobilization ; Thermal treatment ; High enantioselectivity ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The chiral selector L-t-leucine-t-butylamide has been anchored to a polysiloxane by nucleophilic displacement of 2,2,2-trifluoroethyl ester-functionalized block polysiloxanes with L-t-leucine-t-butylamide. Attempts were made to immobilize the chiral polysiloxanes inside the capillaries by thermal treatment at 300°C for 30-90 min. The polysiloxanes were found to be more resistant than Chirasil-Val to the racemization caused by such high temperature treatment. Capillary columns coated with this type of immobilized polysiloxane have shown very high enantioselectivity and thermal stability.

Zusätzliches Material: 3 Ill.