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Title: The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering

Abstract

High porosity (>40 vol %) iron specimens with micro- and nanoscale isotropic pores were fabricated by carrying out free pressureless spark plasma sintering (FPSPS) of submicron hollow Fe–N powders at 750 °C. Ultra-fine porous microstructures are obtained by imposing high heating rates during the preparation process. This specially designed approach not only avoids the extra procedures of adding and removing space holders during the formation of porous structures, but also triggers the continued phase transitions of the Fe–N system at relatively lower processing temperatures. In conclusion, the compressive strength and energy absorption characteristics of the FPSPS processed specimens are examined here to be correspondingly improved as a result of the refined microstructure.

Authors:
; ORCiD logo; ; ;
Publication Date:
Research Org.:
San Diego State Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Materials Sciences Division
OSTI Identifier:
1306381
Grant/Contract Number:  
SC0008581
Resource Type:
Accepted Manuscript
Journal Name:
Materials
Additional Journal Information:
Journal Volume: 9; Journal Issue: 6; Journal ID: ISSN 1996-1944
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; porous iron; hollow Fe-N powder; free pressureless spark plasma sintering; compressive strength

Citation Formats

Cui, Guodong, Wei, Xialu, Olevsky, Eugene, German, Randall, and Chen, Junying. The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering. United States: N. p., 2016. Web. https://doi.org/10.3390/ma9060495.
Cui, Guodong, Wei, Xialu, Olevsky, Eugene, German, Randall, & Chen, Junying. The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering. United States. https://doi.org/10.3390/ma9060495
Cui, Guodong, Wei, Xialu, Olevsky, Eugene, German, Randall, and Chen, Junying. Wed . "The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering". United States. https://doi.org/10.3390/ma9060495. https://www.osti.gov/servlets/purl/1306381.
@article{osti_1306381,
title = {The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering},
author = {Cui, Guodong and Wei, Xialu and Olevsky, Eugene and German, Randall and Chen, Junying},
abstractNote = {High porosity (>40 vol %) iron specimens with micro- and nanoscale isotropic pores were fabricated by carrying out free pressureless spark plasma sintering (FPSPS) of submicron hollow Fe–N powders at 750 °C. Ultra-fine porous microstructures are obtained by imposing high heating rates during the preparation process. This specially designed approach not only avoids the extra procedures of adding and removing space holders during the formation of porous structures, but also triggers the continued phase transitions of the Fe–N system at relatively lower processing temperatures. In conclusion, the compressive strength and energy absorption characteristics of the FPSPS processed specimens are examined here to be correspondingly improved as a result of the refined microstructure.},
doi = {10.3390/ma9060495},
journal = {Materials},
number = 6,
volume = 9,
place = {United States},
year = {2016},
month = {6}
}

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    Works referencing / citing this record:

    Processing metal powders via field assisted sintering technology (FAST): a critical review
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    Fabrication of Porous Materials by Spark Plasma Sintering: A Review
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