双相颗粒混杂增韧HfB2陶瓷复合材料的研究

PDF(347 KB)

材料工程 ›› 2006, Vol. 0 ›› Issue (1) : 24-26,65.

扫码查看或转发全文

论文

双相颗粒混杂增韧HfB₂陶瓷复合材料的研究

李金平^1,2, 韩杰才², 李庆芬¹, 孟松鹤², 张幸红²

作者信息 +

Study of Two-phase Particle Softening HfB₂ Composites

LI Jin-ping^1,2, HAN Jie-cai², LI Qing-fen¹, MENG Song-he², ZHANG Xing-hong²

Author information +

文章历史 +

摘要

将两种颗粒增韧相与HfB₂陶瓷基体按配比混料、热压制备了双相颗粒混杂增韧HfB₂陶瓷复合材料,重点研究其高温压缩性能、热膨胀性能、耐烧蚀性能以及显微组织.结果表明,HfB₂复合材料的室温压缩性能较高,但高温下压缩性能显著下降.随着温度升高,HfB₂复合材料的体积膨胀率单调增加;平均线膨胀系数变化平缓;而瞬时线膨胀系数先减小后增大,有一个最小值,最小瞬时线膨胀系数在900℃,其值为5.65×10^-6/K.该复合材料在等离子电弧加热器上烧蚀8s后,部分韧化相熔化飞出,留下孔洞.

Abstract

The two-phase particle softening HfB₂ composites were prepared by means of mixing and hot-pressing.Their compressive properties,hot expansion coefficient, ablation resistance and the microstructure were studied.The results showed that the compressive properties of the HfB₂ composites at room temperature were finer,while those at high temperature decreased sharply.With the temperature increased,the volume expansion ratio increased gradually;the average linear expansion factor hardly changed;while the instant linear expansion factor decreased first,and then raised,there was a minimum value.It was 5.65×10^-6/K at 900℃.After the HfB₂ composites had been ablated on the plasma-arc heater for 8s,the partial softening particles of the composites were melted and spurted,remaining holes.

导出引用

李金平, 韩杰才, 李庆芬, 孟松鹤, 张幸红. 双相颗粒混杂增韧HfB₂陶瓷复合材料的研究[J]. 材料工程, 2006, 0(1): 24-26,65

LI Jin-ping, HAN Jie-cai, LI Qing-fen, MENG Song-he, ZHANG Xing-hong. Study of Two-phase Particle Softening HfB₂ Composites[J]. Journal of Materials Engineering, 2006, 0(1): 24-26,65

中图分类号： TQ174.75

参考文献

[1] KAUFMAN L,CLOUGHERTY E V.Investigation of boride compounds for high temperature application[A].RTD-TRD-N69-73497,Part XXXVII[C].London:ManLabs Inc,Cambridge,MA,1963.
[2] 李荣久.陶瓷-金属复合材料[M].北京:冶金工业出版社,2002.61-69.
[3] MICHAEL BELYANSKY,MICHAEL TRENARY.Comparison of the surface chemical reactivity of hafnium diboride and hafrnium[J].Inorganica Chimica Acta,1999,289:191-197.
[4] MARK M OPEKA,INNA G TALMY,ERIC J WUCHINA,et al.Mechanical,thermal,and oxidation properties of refractory hafnium and zirconium compounds[J].Journal of the European Ceramic Society,1999,19:2405-2414.
[5] WANG C R,YANG J M,HOFFMAN W.Thermal stability of refractory carbide/boride composites[J].Materials Chemistry and Physics,2002,74:272-281.
[6] MONTEVERDE F,BELLOSI A.Microstructure and properties of an HfB₂-SiC composite for ultrahigh temperature applications[J].Advanced Engineering Materials,2004,(5):331-336.
[7] GASCH M,ELLERBY D,IRBY E,et al.Processing,properties and arc jet oxidation of hafnium diboride/silicon carbide ultra high temperature ceramics[J].Journal of Materials Science,2004,39:5925-5937.
[8] OPILA E,LEVINE S,LORINCZ J.Oxidation of ZrB₂-and HfB₂-based ultra-high temperature ceramics:effect of Ta additions[J].Journal of Materials Science,2004,39:5969-5977.
[9] WUCHINA E,OPEKA M,CAUSEY S,et al.Designing for ultrahigh-temperature applications:the mechanical and thermal properties of HfB₂,HfC_x,HfN_x and aHf(N)[J].Journal of Materials Science,2004,39:5939-5949.