The Manufacturing of High Porosity Iron with an Ultra-Fine Microstructure via Free Pressureless Spark Plasma Sintering
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.
- Research Organization:
- San Diego State Univ., CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Materials Sciences Division
- Grant/Contract Number:
- SC0008581
- OSTI ID:
- 1306381
- Journal Information:
- Materials, Vol. 9, Issue 6; ISSN 1996-1944
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Processing metal powders via field assisted sintering technology (FAST): a critical review
|
journal | June 2019 |
Fabrication of Porous Materials by Spark Plasma Sintering: A Review
|
journal | February 2019 |
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