Crystallization behaviour of rapidly quenched and mechanically alloyed amorphous materials |
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Authors: | M Dehm L Deimling P Häberle W Krauss H Leitz C Politis I Wolf |
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Institution: | (1) Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Postfach 3640, 7500 Karlsruhe, FRG;(2) Edmund Bühler, Postfach 11 26, 7454 Bodelshausen;(3) Department of Electrical and Computer Engineering, University of California, San Diego Mail Code R-007, 92093-0407 La Jolla, CA, USA |
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Abstract: | Amorphous metallic alloys were synthesized by the methods of rapid quenching and by mechanical alloying. In contrast to rapid quenching, mechanical alloying is a new process in producing amorphous alloys. In this paper we will report the amorphization of Ti-Cu, Hf-Cu, Hf-Ni and Fe-Ni-B alloys. The crystallization behaviour of these amorphous alloys was examined by DTA measurements with different heating rates in the range from 1 to 80 K/min. The data of mechanically alloyed powders will be compared with those of rapidly quenched materials. Further characterizations were done by X-ray diffraction, SEM and EDAX analyses. In general, the examined amorphous materials prepared by mechanical alloying or rapid quenching show very similar properties.
Zusammenfassung
Amorphe metallische Legierungen wurden sowohl durch Anwendung der Schnellabschreckverfahren Splat-Cooling und Melt-Spinning als auch durch mechanisches Legieren hergestellt. Im Gegensatz zu den Schnellabschreck-verfahren handelt es sich beim mechanischen Legieren um einen Prozeß zur Synthese amorpher Materialien, der erst seit einigen Jahren bekannt ist. Wir berichten in dieser Arbeit über den Einsatz dieses neuen Verfahrens zur Amorphisierung von Ti-Cu, Hf-Cu, Hf-Ni und Fe-Ni-B Legïerungen und vergleichen diese mit schnell abgeschreckten Materialien. Die Charakterisierung der Proben erfolgte mittels Röntgenbeugung. Differential-Thermo-Analyse (DTA) und Elektronenmikroskopie (SEM und EDAX). Das Kristallisationsverhalten der amorphen Legierungen wurde unter Anwendung von Aufheizgeschwindigkeiten zwischen 1 und 80 K/min untersucht. Diese heizratenabhängigen Messungen wurden sowohl zur Bestimmung von Aktivierungsenergien als auch zur Extrapolation von Kristallisationstemperaturen für isotherme Bedingungen verwendet, wie sie bei der Kompaktierung amorpher Materialien auftreten. Die durchgeführten Untersuchungen zeigten, daß schnell abgeschreckte und mechanisch legierte amorphe Materialien sehr ähnliche Eigenschaften aufweisen.
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![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) $ ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) . ![Dcy](/content/t1368025l6572g67/xxlarge1044.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![softcy](/content/t1368025l6572g67/xxlarge1100.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![jcy](/content/t1368025l6572g67/xxlarge1081.gif) ![shcy](/content/t1368025l6572g67/xxlarge1096.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![khcy](/content/t1368025l6572g67/xxlarge1093.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![kcy](/content/t1368025l6572g67/xxlarge1082.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![bcy](/content/t1368025l6572g67/xxlarge1073.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![dcy](/content/t1368025l6572g67/xxlarge1076.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![gcy](/content/t1368025l6572g67/xxlarge1075.gif) $ ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![gcy](/content/t1368025l6572g67/xxlarge1075.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![fcy](/content/t1368025l6572g67/xxlarge1092.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![kcy](/content/t1368025l6572g67/xxlarge1082.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![mcy](/content/t1368025l6572g67/xxlarge1084.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![mcy](/content/t1368025l6572g67/xxlarge1084.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![dcy](/content/t1368025l6572g67/xxlarge1076.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) SEM ![IEcy](/content/t1368025l6572g67/xxlarge1045.gif) ![Vcy](/content/t1368025l6572g67/xxlarge1042.gif) ![Acy](/content/t1368025l6572g67/xxlarge1040.gif) . ![Scy](/content/t1368025l6572g67/xxlarge1057.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![zcy](/content/t1368025l6572g67/xxlarge1079.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![kcy](/content/t1368025l6572g67/xxlarge1082.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) $ ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) , ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![mcy](/content/t1368025l6572g67/xxlarge1084.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![fcy](/content/t1368025l6572g67/xxlarge1092.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![mcy](/content/t1368025l6572g67/xxlarge1084.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) , ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![ucy](/content/t1368025l6572g67/xxlarge1091.gif) ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![mcy](/content/t1368025l6572g67/xxlarge1084.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![khcy](/content/t1368025l6572g67/xxlarge1093.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![kcy](/content/t1368025l6572g67/xxlarge1082.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) $ ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![bcy](/content/t1368025l6572g67/xxlarge1073.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![rcy](/content/t1368025l6572g67/xxlarge1088.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![lcy](/content/t1368025l6572g67/xxlarge1083.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![zhcy](/content/t1368025l6572g67/xxlarge1078.gif) ![dcy](/content/t1368025l6572g67/xxlarge1076.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![icy](/content/t1368025l6572g67/xxlarge1080.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) , ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![kcy](/content/t1368025l6572g67/xxlarge1082.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![zcy](/content/t1368025l6572g67/xxlarge1079.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) ![acy](/content/t1368025l6572g67/xxlarge1072.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![chcy](/content/t1368025l6572g67/xxlarge1095.gif) ![iecy](/content/t1368025l6572g67/xxlarge1077.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![pcy](/content/t1368025l6572g67/xxlarge1087.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![dcy](/content/t1368025l6572g67/xxlarge1076.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![bcy](/content/t1368025l6572g67/xxlarge1073.gif) ![ncy](/content/t1368025l6572g67/xxlarge1085.gif) ![ycy](/content/t1368025l6572g67/xxlarge1099.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) ![ocy](/content/t1368025l6572g67/xxlarge1086.gif) ![jcy](/content/t1368025l6572g67/xxlarge1081.gif) ![scy](/content/t1368025l6572g67/xxlarge1089.gif) ![tcy](/content/t1368025l6572g67/xxlarge1090.gif) ![vcy](/content/t1368025l6572g67/xxlarge1074.gif) .
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