Inductive flash-annealing of bulk metallic glasses

Abstract We developed a temperature-controlled inductive flash-annealing device, which heats bulk metallic glasses (BMGs) at defined rates of up to 200 K/s to a given temperature. Subsequent instantaneous quenching in water allows preserving the microstructures obtained at various stages of crystall...

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Autores principales:	K. Kosiba, S. Pauly
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2691332e33464d23a4e637f080918016
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spelling	oai:doaj.org-article:2691332e33464d23a4e637f0809180162021-12-02T11:52:35ZInductive flash-annealing of bulk metallic glasses10.1038/s41598-017-02376-x2045-2322https://doaj.org/article/2691332e33464d23a4e637f0809180162017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02376-xhttps://doaj.org/toc/2045-2322Abstract We developed a temperature-controlled inductive flash-annealing device, which heats bulk metallic glasses (BMGs) at defined rates of up to 200 K/s to a given temperature. Subsequent instantaneous quenching in water allows preserving the microstructures obtained at various stages of crystallization. One Zr-based and two CuZr-based BMGs were flash-annealed at the onset of crystallization with different heating rates in order to prepare advanced BMG-matrix composites. The highly reproducible composite microstructures contain uniformly dispersed crystals and a narrow crystal size distribution. In order to assess the limitations of the present process, which mainly originate from non-uniform inductive heating, the skin depth was calculated. It is determined to be about 2.3 mm, which enables flash-annealing of rather bulky samples. The cooling rate was estimated from the interlamellar spacing of eutectic Al-Cu alloys to be on the order of 103 K/s. This ensures that decomposition of the microstructure during quenching is prevented. The present flash-annealing procedure is applicable to a wide variety of glass-forming liquids and has a large potential for tailoring the microstructure and, consequently, the mechanical properties of BMG-matrix composites.K. KosibaS. PaulyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q K. Kosiba S. Pauly Inductive flash-annealing of bulk metallic glasses
description	Abstract We developed a temperature-controlled inductive flash-annealing device, which heats bulk metallic glasses (BMGs) at defined rates of up to 200 K/s to a given temperature. Subsequent instantaneous quenching in water allows preserving the microstructures obtained at various stages of crystallization. One Zr-based and two CuZr-based BMGs were flash-annealed at the onset of crystallization with different heating rates in order to prepare advanced BMG-matrix composites. The highly reproducible composite microstructures contain uniformly dispersed crystals and a narrow crystal size distribution. In order to assess the limitations of the present process, which mainly originate from non-uniform inductive heating, the skin depth was calculated. It is determined to be about 2.3 mm, which enables flash-annealing of rather bulky samples. The cooling rate was estimated from the interlamellar spacing of eutectic Al-Cu alloys to be on the order of 103 K/s. This ensures that decomposition of the microstructure during quenching is prevented. The present flash-annealing procedure is applicable to a wide variety of glass-forming liquids and has a large potential for tailoring the microstructure and, consequently, the mechanical properties of BMG-matrix composites.
format	article
author	K. Kosiba S. Pauly
author_facet	K. Kosiba S. Pauly
author_sort	K. Kosiba
title	Inductive flash-annealing of bulk metallic glasses
title_short	Inductive flash-annealing of bulk metallic glasses
title_full	Inductive flash-annealing of bulk metallic glasses
title_fullStr	Inductive flash-annealing of bulk metallic glasses
title_full_unstemmed	Inductive flash-annealing of bulk metallic glasses
title_sort	inductive flash-annealing of bulk metallic glasses
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/2691332e33464d23a4e637f080918016
work_keys_str_mv	AT kkosiba inductiveflashannealingofbulkmetallicglasses AT spauly inductiveflashannealingofbulkmetallicglasses
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Inductive flash-annealing of bulk metallic glasses

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