NDLI: Evaluation of the Inertness of Investment Casting Molds Using Both Sessile Drop and Centrifugal Casting Methods

Content Provider	Springer Nature Link
Author	Cheng, Xu Yuan, Chen Green, Nick Withey, Paul
Copyright Year	2012
Abstract	The investment casting process is an economic production method for engineering components in TiAl-based alloys and offers the benefits of a near net-shaped component with a good surface finish. An investigation was undertaken to develop three new face coat systems based on yttria, but with better sintering properties. These face coat systems were mainly based on an yttria-alumina-zirconia system (Y$_{2}$O$_{3}$-0.5 wt pct Al$_{2}$O$_{3}$-0.5 wt pct ZrO$_{2}$), an yttria-fluoride system (Y$_{2}$O$_{3}$-0.15 wt pct YF$_{3}$), and an yttria-boride system (Y$_{2}$O$_{3}$-0.15 wt pct B$_{2}$O$_{3}$). After sintering, the chemical inertness of the face coat was first tested and analyzed using a sessile drop test through the metal wetting behavioral change for each face coat surface. Then, the interactions between the shell and metal were studied by centrifugal investment casting TiAl bars. Although the sintering aids in yttria can decrease the chemical inertness of the face coat, the thickness of the interaction layer in the casting was less than 10 μm; therefore, these face coats still can be possible face coat materials for investment casting TiAl alloys.
Starting Page	888
Ending Page	898
Page Count	11
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	44
Issue Number	2
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2012-10-10
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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A Comparison of the Chemical Inertness of Two Y$_{2}$O$_{3}$-Al$_{2}$O$_{3}$-ZrO$_{2}$ and Y$_{2}$O$_{3}$-Al$_{2}$O$_{3}$ Face Coat Materials Through Sessile Drop and Investment Casting Methods

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