张博康,张晓梅,李江涛,杨增朝,宁先进,王全胜.自蔓延法制备球形ZrB2-SiC复合等离子喷涂粉末[J].表面技术,2019,48(4):104-109.
ZHANG Bo-kang,ZHANG Xiao-mei,LI Jiang-tao,YANG Zeng-chao,NING Xian-jin,WANG Quan-sheng.Spherical ZrB2-SiC Composite Plasma Spraying Powder by Self-propagating High-temperature Synthesis[J].Surface Technology,2019,48(4):104-109 |
| 自蔓延法制备球形ZrB2-SiC复合等离子喷涂粉末 |
| Spherical ZrB2-SiC Composite Plasma Spraying Powder by Self-propagating High-temperature Synthesis |
| 投稿时间：2019-01-08 修订日期：2019-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.04.015 |
| 中文关键词: ZrB2-SiC复合粉末 自蔓延高温合成 感应等离子球化 致密度 球形度 共晶组织 |
| 英文关键词:ZrB2-SiC composite powder self-propagating high-temperature synthesis induction plasma spheroidization density sphericity eutectic structure |
| 基金项目: |
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| Author | Institution |
| ZHANG Bo-kang | 1.School of Material Science & Engineering, Beijing Institute of Technology, Beijing 100081, China |
| ZHANG Xiao-mei | 1.School of Material Science & Engineering, Beijing Institute of Technology, Beijing 100081, China |
| LI Jiang-tao | 2.Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
| YANG Zeng-chao | 2.Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
| NING Xian-jin | 1.School of Material Science & Engineering, Beijing Institute of Technology, Beijing 100081, China |
| WANG Quan-sheng | 1.School of Material Science & Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| 中文摘要: |
| 目的 为提高ZrB2-SiC复合等离子喷涂粉末的致密度。方法 采用Zr-B4C-Si体系，使用自蔓延高温合成（SHS）技术和感应等离子球化（IPS）技术制备了球形ZrB2-SiC复合粉末，并对其相结构和微观形貌等进行了表征。结果 采用SHS技术合成出的多孔ZrB2-SiC复合陶瓷，其SiC质量分数为12.10%，由等轴颗粒构成，颗粒粒径均<5 μm。经IPS处理后，粉末松装密度由1.62 g/cm3提高到1.88 g/cm3，其中直径<25 μm的粉末为球形或椭球形，直径>25 μm的粉末则保留了球化前的不规则形状，但粉末轮廓变得平滑。粉末中SiC质量分数降低为6.64%（体积分数为11.89%），粉末表层SiC质量分数降低为5.63%，部分SiC颗粒重新分布在ZrB2颗粒的间隙处，并且粉末中出现ZrB2-SiC的共晶或伪共晶组织。结论 使用SHS技术能够制备出两相分布相对均匀、颗粒细小的ZrB2-SiC复合陶瓷，虽然其含有较多孔洞，但颗粒之间相互接触部位的结合比较紧密。IPS处理后，粒径<25 μm的ZrB2-SiC复合粉末的致密度和球形度获得了显著提高，粉末中SiC在IPS过程中的部分分解导致其含量未能达到最佳范围。 |
| 英文摘要: |
| The work aims to improve the density of ZrB2-SiC composite plasma spraying powder. Spherical ZrB2-SiC com-posite powders were prepared by self-propagating high-temperature synthesis (SHS) and induction plasma spheroidization (IPS) from Zr-B4C-Si system and the phase structures and micro-morphology were characterized. The porous ZrB2-SiC composite ce-ramics synthesized by SHS and with the content of SiC of 12.10% were composed of equiaxed particles with particle size less than 5 μm. After IPS, the apparent density of the powders increased from 1.62 g/cm3 to 1.88 g/cm3. The powders with diameter less than 25 μm were spherical or ellipsoidal, while the larger ones with diameter more than 25 μm retained irregular shape before spheroidization, but the outline became smooth. The content of SiC decreased to 6.64% (percentage of capacity was 11.89%), while SiC content in the surface layer of the powders decreased to 5.63%. Some SiC particles were redistributed in the interstices of ZrB2 particles, and the eutectic or pseudoeutectic structure of ZrB2-SiC appeared in the powders. Therefore, ZrB2-SiC composite ceramics with uniform distribution of ZrB2 and SiC can be prepared by SHS. Although there are many holes in them, the bonding between particles is tight. After IPS, the densification and sphericity of the powders with diameter less than 25 μm have been significantly improved. Partial decomposition of SiC in the powders during IPS results in that the content fails to reach the opti-mum range. |
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