Title

Microstructure and mechanical properties of nickel strengthened by Y2O3through rock-milling and spark plasma sintering

RIS ID

126738

Publication Details

Ma, S., Li, A., Zhou, S., Yang, Y., Wang, S. & Liu, M. (2018). Microstructure and mechanical properties of nickel strengthened by Y2O3through rock-milling and spark plasma sintering. Journal of Alloys and Compounds, 750 911-916.

Abstract

Microstructure and mechanical properties of nickel-Y 2 O 3 composites with content of 1 wt %, 2 wt %, 3 wt %, 5 wt % Y 2 O 3 were prepared by rock-milling and spark plasma sintering were investigated. The obtained experimental data clearly show that the nickel with different contents of Y 2 O 3 powders was evenly distributed after rock-milling 4 h with 30 Hz. Particle size analysis indicates that the grain size was fine and the average grain size was below 0.40 μm. The nickel-2 wt. %Y 2 O 3 shows better relative density and Brinell hardness of 92.7% and 146 HBW, respectively. The compressive strength of nickel-Y 2 O 3 was also investigated and the specimens of nickel-1 wt. % Y 2 O 3 and nickel-2 wt. %Y 2 O 3 had not exhibited obviously crack or imperfections in the surface. However, specimens of nickel-3 wt. % Y 2 O 3 and nickel-5 wt. % Y 2 O 3 had the ultimate stress with increasing the loads, and the values were 1100 MPa and 1200 MPa, respectively.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.jallcom.2018.04.067