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Open AccessArticle

Fabrication and Characteristics of Sintered Cutting Stainless Steel Fiber Felt with Internal Channels and an Al2O3 Coating

1
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
2
Department of Mechanical Engineering, University of South Carolina, Columbia, SC 2910, USA
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 455; https://doi.org/10.3390/ma11030455
Received: 19 January 2018 / Revised: 27 February 2018 / Accepted: 14 March 2018 / Published: 20 March 2018
(This article belongs to the Section Porous Materials)
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Abstract

A novel sintered cutting stainless steel fiber felt with internal channels (SCSSFFC) composed of a stainless-steel fiber skeleton, three-dimensional interconnected porous structure and multiple circular microchannels is developed. SCSSFFC has a jagged and rough surface morphology and possesses a high specific surface area, which is approximately 2.4 times larger than that of the sintered bundle-drawing stainless steel fiber felt with internal channels (SBDSSFFC) and is expected to enhance adhesive strength. The sol-gel and wet impregnation methods are adopted to prepare SCSSFFC with an Al2O3 coating (SCSSFFC/Al2O3). The adhesive strength of SCSSFFC/Al2O3 is investigated using ultrasonic vibration and thermal shock tests. The experimental results indicate that the weight loss rate of the Al2O3 coating has a 4.2% and 8.42% reduction compared with those of SBDSSFFCs based on ultrasonic vibration and thermal shock tests. In addition, the permeability of SCSSFFC/Al2O3 is investigated based on forced liquid flow tests. The experimental results show that the permeability and inertial coefficients of SCSSFFC/Al2O3 are mainly affected by the coating rate, porosity and open ratio; however, the internal microchannel diameter has little influence. It is also found that SCSSFFC/Al2O3 yields superior permeability, as well as inertial coefficients compared with those of other porous materials reported in the literature. View Full-Text
Keywords: porous materials; sintered cutting stainless-steel fiber felt; adhesive strength; permeability porous materials; sintered cutting stainless-steel fiber felt; adhesive strength; permeability
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Huang, S.; Wan, Z.; Zou, S. Fabrication and Characteristics of Sintered Cutting Stainless Steel Fiber Felt with Internal Channels and an Al2O3 Coating. Materials 2018, 11, 455.

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