ZrB₂ ceramics with various hexagonal BN (hBN) additions up to 37 vol% were reactively densified by spark plasma sintering using powder mixtures containing ZrB₂, ZrN and boron. ZrN-boron based additives effectively promoted the densification process, ZrB₂ ceramics reached >99 % relative density at 2000 °C and an applied pressure of 60 MPa with only 5 vol% in-situ formed hBN, whereas the relative density of pure ZrB₂ was only 91.2 % at the same conditions. Increasing the hBN contents, the morphology of hBN grains gradually changed from quasi-spherical to flake dominated, which has substantial influence on their mechanical properties. In-situ ZrB₂-10 vol% hBN ceramics demonstrated high flexural strength of 597 ± 22 MPa, relatively low Young’s modulus of 406 GPa and good machinability, especially for the impressively large strain to failure (1.47 × 10⁻³) which is superior to most of their counterparts in the ZrB₂ based particulate reinforced ceramics.

使用含有ZrB ₂，ZrN和硼的粉末混合物，通过火花等离子体烧结，对添加了多达37 vol％的各种六方BN（h BN）的ZrB ₂陶瓷进行了反应性致密化。ZrN-硼基添加剂有效地促进了致密化过程，ZrB ₂陶瓷在2000°C和60 MPa的施加压力下达到了99％的相对密度，而原位形成的h BN仅为5 vol％，而纯ZrB的相对密度在相同条件下，₂仅为91.2％。增加h BN含量，h的形态BN晶粒逐渐从准球形变为片状，这对其机械性能产生了重大影响。原位ZrB ₂ -10 vol％h BN陶瓷表现出597±22 MPa的高弯曲强度，相对较低的406 GPa杨氏模量和良好的可加工性，尤其是对于令人印象深刻的大破坏应变（1.47×10 ^-3）优于基于ZrB ₂的颗粒增强陶瓷中的大多数同类产品。