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Modifizierung einer Al-Si-Legierung auf nichtkonventionelle Weise
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ISBN10: 6208639581
ISBN13: 9786208639587
Publisher: Verlag Unser Wissen
Published: Feb 9 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: German
ISBN13: 9786208639587
Publisher: Verlag Unser Wissen
Published: Feb 9 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: German
Al-Si-Legierungen mit hohem Überma finden Anwendung in Kleinmotoren, Kolben für Klimakompressoren und anderen Komponenten in Automatikgetrieben. Sie sind leicht und zeichnen sich durch eine hervorragende Verschlei festigkeit, einen niedrigeren Wärmeausdehnungskoeffizienten und sehr gute Gie eigenschaften aus. Der Einsatz solcher Legierungen wird durch das Vorhandensein einer extrem harten primären Siliziumphase eingeschränkt, die die Bearbeitbarkeit verringert. In der vorliegenden Arbeit wird versucht, die mechanischen Eigenschaften von übereutektischen Al-17Si-Legierungen durch Modifizierung von primärem Silizium und eutektischem Silizium auf nicht konventionelle Weise zu verbessern. Die Legierungen werden durch Zugabe von Oxiden und Chloriden modifiziert. Die Auswirkungen von Oxiden und Chloriden auf die Morphologie und Grö e der Si-Phasen in den übereutektischen Al-Si-Legierungen werden untersucht. Bei den modifizierten Legierungen wurde eine Zunahme der mechanischen Eigenschaften wie Härte, Zugfestigkeit und Dehnung in % beobachtet. Die verbesserten Eigenschaften sind abhängig von einer gleichmä igen Verteilung von feinem, faserigem eutektischem Al-Silizium und feinen primären Si-Partikeln. Die Ergebnisse der Arbeit sollten für akademische Forscher und andere Personen, die an nützlichen Informationen über Al-Si-Legierungen interessiert sind, von Nutzen sein.
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