| 引用本文: | 王和平,梁一鸣,刘时强,李金平,周玉锋.爆炸压实ZrB2-SiC超高温陶瓷的密度与组织[J].材料科学与工艺,2011,19(5):50-53.DOI:10.11951/j.issn.1005-0299.20110511. |
| WANG He-ping,LIANG Yi-ming,LIU Shi-qiang,LI Jing-ping,ZHOU Yu-feng.Densities and microstructure of ultrahigh temperature ceramics ZrB2-SiC prepared by explosive compaction[J].Materials Science and Technology,2011,19(5):50-53.DOI:10.11951/j.issn.1005-0299.20110511. |
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| 摘要: |
| 为了研究炸药对ZrB2-SiC超高温陶瓷密度与组织的影响,采用爆炸压实工艺制备了SiC纳米颗粒和SiC晶须分别增韧的两类ZrB2基超高温陶瓷复合材料.研究发现:选择低速的硝酸铵或高速的黑索今时,两类ZrB2-SiC爆炸压实坯密度都比较低,而选择混合炸药时致密效果较好;采用225 g黑索今与75 g硝酸铵的混合炸药时,ZrB2-SiCw超高温陶瓷的最高致密度达到了95.25%,ZrB2-SiCnm超高温陶瓷的最高致密度达到了96.12%;球磨混料后,纳米颗粒或晶须都能均匀弥散在微米ZrB2基体中.与ZrB2-SiCw超高温陶瓷爆炸压实坯相比,ZrB2-SiCnm超高温陶瓷显微组织细小,且不出现ZrB2与SiC相的富集,是比较理想的显微结构. |
| 关键词: 爆炸压实 超高温陶瓷 ZrB2-SiC 纳米SiC SiC晶须 |
| DOI：10.11951/j.issn.1005-0299.20110511 |
| 分类号:TQ174.1 |
| 基金项目:特种环境复合材料技术国防科技重点实验室开放基金资助项目(HIT.KLOF.2009034) |
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| Densities and microstructure of ultrahigh temperature ceramics ZrB2-SiC prepared by explosive compaction |
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WANG He-ping1, LIANG Yi-ming2, LIU Shi-qiang3, LI Jing-ping3, ZHOU Yu-feng3
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1.Yantai Branch,No.52 Institute,Ministry of Ordnance Industry of PRC,Yantai 264003,China;2.The First Flight Group of 93413 Troops,Yongji 044500,China;3.Center for Composite Materials, Harbin Institute of Technology,Harbin 150080,China
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| Abstract: |
| To study the effect of explosive on densities and microstructure of ultrahigh temperature ceramics ZrB2-SiC,two kinds of ZrB2 matrix toughened by SiC whisker or SiC nanoparticles were prepared by explosive compaction.When low speed explosive Ammonium or high speed RDX was chosen,the densities of ZrB2-SiC ceramics were lower.While,when the hybrid explosive of Ammonium and RDX was chosen,their densities were higher.If the hybrid explosive of 225 g RDX and 75 g Ammonium was used,the maximum value of the densities of ZrB2-SiCw ultrahigh temperature ceramics was 95.25%,and that of ZrB2-SiCnm was 96.12%.The SiC nanoparticles or SiC whisker can be uniformly dispersed in the micrometer ZrB2 matrix after mixing.Compared with ZrB2-SiCw,the microstructure of ZrB2-SiCnm is finer,more uniform and perfect without phase segregation. |
| Key words: explosive compaction ultrahigh temperature ceramics ZrB2-SiC SiC nanoparctiles SiC whisker |
