The coefficient of thermal expansion of zirconium nitride

Effect of porosity on thermal and electrical properties of polycrystalline bulk ZrN prepared by spark plasma sintering

“…sample is almost the same as that of 91.3% T.D. sample and both the data correspond to those in the literatures [13][14][15][16][17]. Since ther- mal expansion typically depends on the local atomic bonding, thermal expansion is normally independent of the porosity and grain size [18].…”

“…1, together with the literature data [13][14][15][16][17]. All thermal expansion data in the literatures were obtained from the high-temperature powder X-ray diffraction measurement.…”

Synthesis and properties of oxygen-bearing c-Zr3N4 and c-Hf3N4

“…It can be seen from Fig. 3 that˛(T) increases from 6.6 × 10 −6 K −1 to 14.2 × 10 −6 K −1 in the investigated temperature region and is about twice as large as those of ␦-ZrN [32][33][34] and o-Zr 3 N 4 [5] at 900 K. Such a high˛(T) value of c-Zr 2.86 (N 0.88 O 0.12 ) 4 can be explained by a less symmetric interatomic potential in c-Zr 3 N 4 due to higher atomic coordinations when compared with ␦-ZrN and o-Zr 3 N 4 . It should be also mentioned that, similar to o-Zr 3 N 4 and zirconium oxynitrides [35], c-Zr 2.86 (N 0.88 O 0.12 ) 4 starts to oxidise in air above 773 K. The main oxidation product was found to be ␥-Zr 2 ON 2 [36] which further oxidises to monoclinic ZrO 2 .…”

Experimental assessment of thermophysical properties of (Pu,Zr)N

“…The TD were calculated by the X-ray method from the lattice parameter reported by Baker [1] for ZrN, and from the lattice parameter given by the Vegards law for (Zr, Pu)N as shown by Arai et al [2] from the PuN parameter reported by Wriedt [3]. The values that can be found in literature for the TD of ZrN vary between 6.8 and 7.4 g cm À3 depending upon the determination method, the purity and the stochiometry (N/Zr ratio) of the material.…”