Influence of iron nanopowder addition on the densification of chromium-prealloyed water-atomised powder metallurgy steel admixed with nickel
Journal article, 2023

High sintered density is desired for heavy-duty applications and there are different ways through which the sintered density can be improved. In the current study, nanopowder is blended to the conventionally used micrometre-sized water-atomised steel powder to evaluate its impact on sintering. Both the powder variants, without and with nanopowder, were subjected to thermogravimetry analysis, and uniaxially compacted to the same green density of 7.15 g/cc or 90% relative density and sintered at 1250°C in pure hydrogen. A comparative analysis was performed with respect to the microstructural evolution between the micro and micro/nano bimodal powder compacts. JMatPro and electron backscattered diffraction was used to understand the microstructural evolution. An attempt was made to understand the improved linear shrinkage in the micro/nano bimodal powder compact using a combination of microstructure analysis and chemical analysis.

thermogravimetry

sintering

JMatPro

Nanopowder

dilatometry

Author

Swathi Kiranmayee Manchili

Chalmers, Industrial and Materials Science, Materials and manufacture

Bala Malladi

Chalmers, Industrial and Materials Science, Materials and manufacture

M. Vattur Sundaram

Höganäs

Eduard Hryha

Chalmers, Industrial and Materials Science, Materials and manufacture

Lars Nyborg

Chalmers, Industrial and Materials Science, Materials and manufacture

Powder Metallurgy

0032-5899 (ISSN) 1743-2901 (eISSN)

Vol. 66 4 309-315

Subject Categories

Inorganic Chemistry

Ceramics

Materials Chemistry

DOI

10.1080/00325899.2023.2190477

More information

Latest update

3/7/2024 9