Effect of Ni addition on the preparation of Al₂O₃–TiB₂ composites using high-energy ball milling

Peer review under responsibility of The Ceramic Society of Japan and the Korean Ceramic Society.

Figures & data

Fig. 1 Standard Gibbs free energy of formation as a function of temperature for Al₂O₃, B₂O₃, TiO₂ and NiO.

Table 1 Lattice parameter (a) of NiAl for different milling times.

Milling time (h)	4	8	12
a (Å)	2.877	2.871	2.867

Fig. 2 XRD patterns of the Ni-containing powders after different milling times. The inset picture shows corresponding local amplification.

Fig. 3 XRD patterns of the Ni-free powders after different milling times.

Fig. 4 The variation of crystallite size (a) and lattice strain (b) of Al in the two types of powders at different milling times.

Fig. 5 TEM images (a) and associated SADPs (b) of the Group #1 powder milled for 16 h.