ZrB₂-SiBCN ceramics with ZrO₂ additive are hot-pressed under a constant applied pressure. The densification behavior of the composites is studied in a view of creep deformation by means of the Bernard-Granger and Guizard model. With determination of the stress exponent (n) and the apparent activation energy (Q_d), the specific deformation mechanisms controlling densification are supposed. Within lower temperature ranges of 1300–1400 °C, the operative mechanism is considered to be grain boundary sliding accommodated by atom diffusion of the polymer-derived SiBCN (n = 1, Q_d = 123±5 kJ/mol) and by viscous flow of the amorphous SiBCN (n = 2, Q_d = 249±5 kJ/mol). At higher temperatures, the controlling mechanism transforms to lattice or intra-granular diffusion creep (n = 3–5) due to gradual consumption of the amorphous phase. It is suggested that diffusion of oxygen ions inside ZrO₂ into the amorphous SiBCN decreases the viscosity, modifies the fluidity, and contributes to the grain boundary mobility.

具有ZrO ₂添加剂的ZrB ₂ -SiBCN陶瓷在恒定的施加压力下进行热压。借助蠕变变形，利用Bernard-Granger和Guizard模型研究了复合材料的致密化行为。通过确定应力指数（n）和表观活化能（Q _d），推测出控制致密化的特定变形机制。在1300–1400°C的较低温度范围内，其作用机理被认为是由聚合物衍生的SiBCN的原子扩散（n = 1，Q _d = 123±5 kJ / mol）和粘滞流动引起的晶界滑动。非晶SiBCN（n= 2，Q _d = 249±5 kJ / mol）。在更高的温度下，由于非晶相的逐渐消耗，控制机制转变为晶格或晶内扩散蠕变（n = 3-5）。认为ZrO ₂内部的氧离子向非晶态SiBCN的扩散降低了粘度，改变了流动性，并有助于晶界迁移率。