无机材料学报2026，Vol.41Issue(7)：947-954,中插7-中插10,12.DOI:10.15541/jim20250410
SiC颗粒含量对(Ti,Zr,Hf,Ta,Cr)(C,N)-SiC陶瓷力学性能及耐烧蚀性能的影响
Effect of SiC Particle Content on Mechanical Properties and Ablation Resistance of(Ti,Zr,Hf,Ta,Cr)(C,N)-SiC Ceramics
摘要
Abstract
Compared to conventional ultra-high temperature ceramics(UHTCs),multi-principal carbonitride UHTCs exhibit superior high-temperature stability and ablation resistance.However,the inherent brittleness of these materials poses a significant constraint on their widespread applications.To overcome this drawback,in this study,(Ti,Zr,Hf,Ta,Cr)(C,N)-SiC ceramics were fabricated by combining mechanical alloying/nitridation with spark plasma sintering through the introduction of second-phase SiC particles(SiCp)into the system,and influence of different SiCp contents on the mechanical properties and ablation resistance of the materials was systematically investigated.The results indicate that incorporation of SiCp effectively enhances the mechanical properties of the materials.When the volume fraction of SiCp reaches 20%,the fracture toughness achieves(5.18±0.24)MPa·m1/2,representing a substantial enhancement of 31.5%compared to the(Ti,Zr,Hf,Ta,Cr)(C,N)ceramic.This improvement in fracture toughness can be attributed to toughening mechanisms,including crack deflection and branching,owing to the introduction of SiCp.Further oxygen-acetylene ablation tests at 2100℃for 120 s demonstrate that incorporation of SiCp also significantly enhances the ablation resistance of the material.The optimal performance is achieved at a SiCp volume fraction of 20%,with a mass ablation of-0.92 mg/s and a linear ablation of-1.17 μm/s,outperforming most reported conventional UHTCs.The enhancement in ablation resistance can be attributed to the pinning effect exerted by a high-melting-point multicomponent oxide skeleton on the low-melting-point SiO2 phase,as well as the synergistic formation of a multicomponent dense oxide barrier that effectively suppresses oxygen diffusion.This work presents a strategy to resolve the intrinsic brittleness of multi-principal carbonitride UHTCs through the optimal incorporation of SiCp,which concurrently improves the mechanical properties and ablation resistance.These results provide a theoretical foundation and experimental data for the design of advanced thermal protection materials.关键词
多主元碳氮化物陶瓷/SiC颗粒/力学性能/耐烧蚀性能Key words
multi-principal carbonitride ceramic/SiC particle/mechanical property/ablation resistance分类
通用工业技术引用本文复制引用
彭裕超,董源,董顺,夏莲森,胡佩涛,张幸红,周延春..SiC颗粒含量对(Ti,Zr,Hf,Ta,Cr)(C,N)-SiC陶瓷力学性能及耐烧蚀性能的影响[J].无机材料学报,2026,41(7):947-954,中插7-中插10,12.基金项目
国家自然科学基金(52272060,52522203) （52272060,52522203）
国家重点研发计划(52032003) （52032003）
中央高校基本科研业务费专项资金(FRFCU5710050424)National Natural Science Foundation of China(52272060,52522203) （FRFCU5710050424）
National Key R&D Program of China(52032003) （52032003）
Fundamental Research Funds for the Central Universities(FRFCU5710050424) （FRFCU5710050424）
