Microstructure and Mechanical Property of Hot-Pressed Al₂O₃-Ni-P Composites Using Ni-P-Coated Al₂O₃ Powders

Table 1

Ni contents and material properties of Al₂O₃ and hot-pressed Al₂O₃-Ni-P composites.

	Ni content (wt.%)	Hardness (kgf/mm^2)	Relative density (g/L)	Fracture toughness (MPa·m^1/2)
Al2O3	—	1834	96.2%	2.6
Al2O3-10 wt.% Ni3P	10.9	2130	98.0%	5.1
Al2O3-15 wt.% Ni3P	14.4	2358	99.1%	5.9
Al2O3-20 wt.% Ni3P	20.4	2185	98.5%	4.7