Core‒rim structures were identified as a common feature in hot-pressed ZrB₂‒SiC‒MC ceramics (M = Nb, Hf, Ta and W) by a combination of X-ray diffraction, scanning and transmission electron microscopies. Quantitative analyses associate them with the bi-solubility of M in ZrB₂ phase, in which transition of solubility across the core/rim boundary is abrupted, signifying their creation via dissolution‒reprecipitation process facilitated by transient liquid-phase. The cores were retained from starting powder after surface melting and the rims were grown from the liquid-phase to incorporate more solutes, leaving the residual liquid to turn into ZrC phase with higher solubility of M. We propose g-point scheme in the ZrB₂‒MB₂ diagrams to combine the bi-solubility and the core‒rim structures into an intra-phase relationship created by sintering, leading further to a hierarchical phase relationship. The temperature dependence of flexural strength in the ZrB₂‒SiC‒MC ceramics varies with MC additions, which can be respectively strengthened by the strain energy created in the core‒rim structures and metal segregation to grain boundaries.

 通过X射线衍射，扫描和透射电子显微镜的结合，确定了铁芯边缘结构是热压ZrB ₂ ‒SiC‒ M C陶瓷（M = Nb，Hf，Ta和W）的共同特征。定量分析将它们与M在ZrB ₂相中的双溶解度联系起来，其中溶解度在核/边缘边界上的跃迁突然发生，这表明它们是通过瞬时液相促进的溶解-再沉淀过程而形成的。表面融化后，保留了起始粉末中的核，边缘从液相中生长出来以吸收更多的溶质，使残留的液体变成具有较高M溶解度的ZrC相。。我们在ZrB ₂ ‒ M B ₂图中提出g点方案，以将双溶解度和核边缘结构结合到通过烧结产生的内相关系中，从而进一步导致分层相关系。ZrB ₂ ‒SiC‒ M C陶瓷的抗弯强度与温度的相关性随MC的添加而变化，这可通过芯缘结构中产生的应变能和金属偏析到晶界处来分别增强。