Near Full Density Nano Iron-Based Materials by Pulse Current Sintering

Yuan Yuan Li; Yan Long; Xiao Qiang Li; Tungwai Leo Ngai

doi:10.4028/www.scientific.net/KEM.353-358.2143

Paper Titles

Adhesion Evaluation of Titanium Oxides Films on 316L Stainless Steel Substrate
p.2127

Synthesis of SnO₂ Nanoparticles and Their Application on Gas Sensors
p.2131

Ultrafine TiO₂ Powders Prepared from Aqueous TiCl₄ Solutions at Room Temperature
p.2135

The Synthesis and Properties Studying of 1-D TaS₂ Nanostructure
p.2139

Near Full Density Nano Iron-Based Materials by Pulse Current Sintering
p.2143

Lactose Modified Chitosan Scaffold for Hepatocytes Culture
p.2147

Phenomenological Study of the Size Effect on Martensitic Transformation in Nanograined Powders
p.2151

Comparison of Property of Dynamic Melting-Loss H13 Steel by Different Surface Treatment
p.2155

Molecular Aspect of Osteoporotic Fracture Healing
p.2159

HomeKey Engineering MaterialsKey Engineering Materials Vols. 353-358Near Full Density Nano Iron-Based Materials by...

Near Full Density Nano Iron-Based Materials by Pulse Current Sintering

Abstract:

Constant current plus pulse current electrical sintering was introduced into the sintering of a ball-milled nanocrystalline Fe-2Cu-2Ni-1Mo-0.8C mixed powder. Effect of pulse current charging time on the properties of sintered products was studied. Constant electric current sintering was also used for comparison. A nanostructured iron-based material was obtained within 4 minutes of sintering. It has a density of 7.7 g/cm3 (relative density of 98.7 %) with an average grain size (iron-matrix) of 58 nm and carbide particle size of less than 100 nm, a hardness of HRC 64 and transverse rupture strength of 2004 MPa. When only pulsed electric current sintering was used with a sintering time of 5 min, a fine grained iron-base material with density of 7.74 g/cm3 (relative density of 99.2%), a hardness of HRC 65 and transverse rupture strength of 2045 MPa was obtained.