Sintering of Zirconium Boride With Activating Additions

Densification of ZrB2-based composites and their mechanical and physical properties: A review

“…20 Cech et al 61 used Ni, Co, Fe and Re to produce an almost fully densified ZrB 2 at 2000 • C and 2200 • C in vacuo or in an argon atmosphere. They found that addition of ≥2 wt% of metals was required to bring about adequate sintering, because formation and continuous action of a liquid phase occurred only at higher contents of added metals.…”

“…61 Therefore, the increase of Young's modulus due to Ni addition is associated with the decrease in the crystal lattice dimensions of ZrB 2 . B 4 C alone or a combination of B 4 C with C also led to an increase in Young's modulus.…”

Refractory Diborides of Zirconium and Hafnium

“…They hypothesized that the C reduced ZrO 2 , which subsequently reacted with the B to produce active ZrB 2 nuclei on the surface of larger ZrB 2 grains. Cech et al 129 added metals to accelerate densification. They reported ∼100% density for ZrB 2 sintered at 2200°C for 1 h in argon when adding 1 wt% Re, or 0.5 wt% Cr +0.5 wt% Ti.…”

Pressureless Sintering of High‐Density ZrB2–SiC Ceramic Composites

“…Incorporation of additives such as TiB 2 , Si 3 N 4 , B 4 C has been reported to assist beneficially the poor sinterability of ZrB 2 , but often sacrifices high‐temperature strength and oxidation resistance 11–13 . Metallic additives also confer the densification behavior of ZrB 2 and other boron compounds 14,15 . In addition, studies performed by Kisliy et al 16 .…”