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Home > Manufacture and Properties of Salt Balls as Space Holder for Open-cell Metallic Foams
 
Manufacture and Properties of Salt Balls as Space Holder for Open-cell Metallic Foams
Paper Type
Contributed Paper
Title
Manufacture and Properties of Salt Balls as Space Holder for Open-cell Metallic Foams
Author
Jutanon Boonprasert and Seksak Asavavisithchai*
Email
seksak.a@chula.ac.th
Abstract:

Open-cell metallic foam is an attractive material to industries, owing to its outstanding properties, such as interconnected porosity, light weight, large surface area and high service temperature. One of popular methods to produce this foam is by using space holder to create porosity in foam structure, owing to its simplicity and low manufacturing cost. Among various space holder materials, NaCl is the most widely used one, due to low cost, high melting point, rapid dissolution by water and environmental friendly. In the present project, spherical NaCl balls of three different sizes have been manually manufactured by hand. The balls were sintered to increase their mechanical strength. Dissolution ability, macro- and microstructural examination as well as compressive mechanical testing were also performed. The smallest NaCl ball was then selected in production of Al foam. The result showed that the NaCl ball can be used to produce open-cell Al foam with interconnected spherical pores, replicating the morphology of NaCl ball.  In addition, apart from spherical shape, various morphology of salt balls can be tailored to produce a metallic foam with specific porous structure, in order to obtain specific properties.

Keywords:  Metallic foam, Space holder, Porosity, NaCl  

Start & End Page
270 - 277
Received Date
2019-09-20
Accepted Date
2020-01-21
Full Text
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Correspondence:
Author Name
Seksak Asavavisithchai - Innovative Metals Research Unit, Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Keyword:
Keyword
metallic foam, space holder, porosity, NaCl,
Volume
Vol.47 No.2 (Special Issue I : March 2020)
 




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