NDLI: Effects of Phosphorus and Carbon Contents on Amorphous Forming Ability in Fe-based Amorphous Alloys Used for Thermal Spray Coatings

Content Provider	Springer Nature Link
Author	Do, Jeonghyeon Jung, Seungmun Lee, Hyuk Joong Lee, Byeong Joo Cha, Gil up Jo, Chang Yong Lee, Sunghak
Copyright Year	2013
Abstract	Cost-effective Fe-based amorphous alloys used for thermal spray coatings were developed by varying contents of P and C, and their microstructure, hardness, and corrosion resistance were analyzed. In order to achieve chemical compositions having high amorphous forming ability, thermodynamically calculated phase diagrams of Fe-Al-P-C-B five-component system were used, from which compositions of super-cooled liquid having the lowest driving force of formation of crystalline phases were obtained. The thermodynamic calculation results showed that only phases of Fe$_{3}$P and Fe$_{3}$C were formed in the Fe$_{78}$Al$_{2}$P$_{(18.3−x)}$C$_{ x }$B$_{1.7}$ alloy system. Considering driving force curves of Fe$_{3}$P and Fe$_{3}$C, the carbon contents were selected to be 6.90 and 7.47 at. pct, when the thermodynamic calculation temperatures were 697 K (414 °C) and 715 K (442 °C), respectively. According to the microstructural analysis of suction-cast alloys, the Fe$_{78}$Al$_{2}$P$_{10.83}$C$_{7.47}$B$_{1.7}$ alloy showed a fully amorphous microstructure, whereas the Fe$_{78}$Al$_{2}$P$_{11.40}$C$_{6.9}$B$_{1.7}$ and Fe$_{78}$Al$_{2}$P$_{10.3}$C$_{8.0}$B$_{1.7}$ alloys contained Fe$_{3}$P and Fe$_{3}$C phases. This Fe$_{78}$Al$_{2}$P$_{10.83}$C$_{7.47}$B$_{1.7}$ alloy showed the better hardness and corrosion resistance than those of conventional thermal spray coating alloys, and its production cost could be lowered using cheaper alloying elements, thereby leading to the practical application to amorphous thermal spray coatings.
Starting Page	2573
Ending Page	2580
Page Count	8
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	44
Issue Number	6
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2013-02-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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