以鳞片石墨和硅粉为混合原料,采用真空热压烧结工艺制备碳化硅增强石墨基复合材料。考察原料中硅粉含量对复合材料性能和结构的影响。 XRD与SEM分析表明,经1900℃热压烧结后,硅粉与石墨发生原位反应生成碳化硅强化相,形成的碳化硅均匀分散在石墨片层间。随着硅质量分数从28.06%提高到37.94%,复合材料的弯曲强度从112 MPa提高至206 MPa。此外,当硅含量低于31.46%时,复合材料的摩擦系数恒定为0.1,与纯石墨的摩擦系数相当。
Silicon carbide_reinforced graphite composites were prepared by hot_pressing mixtures of flake graphite and Si powder with various mass ratios under vacuum. The microstructure and phase compositions were characterized by SEM and XRD. Results indicated that SiC, resulting from the reaction between graphite and silicon, was uniformly dispersed in the graphite matrix. The bend strength of the composites increased from 112 to 206 MPa with increasing silicon content from 28. 06 to 37. 94 mass%. The oxidation resistance of the composites increased with their silicon content. The coefficient of friction of the composites remainedat a low constant value of about 0. 1 when the Si content was below 31. 46 mass%.
参考文献
| [1] | Gregory Tricot;Nathalie Nicolaus;Pascal Diss .Inhibition of the catalytic oxidation of carbon/carbon composite materials by an aluminophosphate coating[J].Carbon: An International Journal Sponsored by the American Carbon Society,2012(10):3440-3445. |
| [2] | Y. H. Zhang;Z. C. Xiao;J. P. Wang;R. P. Xing;Z. G. Peng;J. M. Su;Z. H. Jin .Effect of pyrocarbon content on thermal and frictional properties in C/C preforms of C/C-SiC composites[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2010(1/2):132-138. |
| [3] | Marco E. Siegrist;Esther D. Amstad;Jorj F. Loffler .Tribological properties of graphite- and ZrC-reinforced bulk metallic glass composites[J].Intermetallics,2007(9):1228-1236. |
| [4] | Martin Dienwiebel;Gertjan S. Verhoeven;Namboodiri Pradeep;Joost W. M. Frenken .Superlubricity of Graphite[J].Physical review letters,2004(12):126101.1-126101.4. |
| [5] | 蒋建纯,黄伯云,熊翔.炭/炭复合航空刹车材料的结构完整性对摩擦系数的影响[J].新型炭材料,2003(02):111-116. |
| [6] | 宋永忠,邱海鹏,郭全贵,翟更太,宋进仁,刘朗.粘结剂含量对石墨材料电、热传导性能的影响[J].新型炭材料,2002(02):56-60. |
| [7] | Xia, H.;Wang, J.;Shi, Z.;Qiao, G. .Reciprocating friction and wear properties of mesocarbon microbeads-based graphite and siliconized graphite[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2013(1/3):341-344. |
| [8] | A. Ya. Krasilnikov;A. A. Krasilnikov .MAGNETIC CLUTCHES AND MAGNETIC SYSTEMS IN SEALED MACHINES[J].Chemical and petroleum engineering,2012(5/6):306-310. |
| [9] | Masaki Yoshio;Hongyu Wang;Kenji Fukuda .Carbon-Coated Si as a Lithium-Ion Battery Anode Material[J].Journal of the Electrochemical Society,2002(12):A1598-A1603. |
| [10] | Xie J;Cao GS;Zhao XB .Electrochemical performances of Si-coated MCMB as anode material in lithium-ion cells[J].Materials Chemistry and Physics,2004(2/3):295-299. |
| [11] | Hilmi Buqa;Dietrich Goers;Michael Holzapfel .High Rate Capability of Graphite Negative Electrodes for Lithium-Ion Batteries[J].Journal of the Electrochemical Society,2005(2):A474-A481. |
| [12] | Melanie Alias;Olivier Crosnier;Izabela Sandu;Gwenole Jestin;Alexandre Papadimopoulos;Frederic Le Cras;Donald M. Schleich;Thierry Brousse .Silicon/graphite nanocomposite electrodes prepared by low pressure chemical vapor deposition[J].Journal of Power Sources,2007(2):900-904. |
| [13] | 冉丽萍,易茂中,蒋建献,葛毅成.炭/炭复合材料MoSi2/SiC高温抗氧化复合涂层的制备及其结构[J].新型炭材料,2006(03):231-236. |
| [14] | Boecker W D;Hailey L N .Sintered silicon carbide/graphite/carbon composite ceramic body having ultrafine grain micro_structure[P].U.S.Patent 4,525,461,1985-6-25. |
| [15] | Saeed Safi;Asghar Kazemzadeh .MCMB-SiC composites; new class high-temperature structural materials for aerospace applications[J].CERAMICS INTERNATIONAL,2013(1):81-86. |
| [16] | 王艳香,谭寿洪,江东亮.反应烧结碳化硅的研究与进展[J].无机材料学报,2004(03):456-462. |
| [17] | Congxu Zhu;Jing Lang;Nangang Ma .Preparation of Si-diamond-SiC composites by in-situ reactive sintering and their thermal properties[J].CERAMICS INTERNATIONAL,2012(8):6131-6136. |
| [18] | Samoilov V M;Porodzinskiy I A .Preparation and investigation of silicon carbide materials on the basis of reaction_bonded sili_con carbide[J].Inorganic Materials:Applied Research,2014(5):540_544. |
| [19] | 刘桂香.炭/炭复合材料的抗氧化研究[J].炭素,2004(02):24-26. |
| [20] | Xin Yang;Qizhong Huang;Zhean Su;Xin Chang;Liyuan Chai;Chunxuan Liu;Liang Xue;Dong Huang .Resistance to oxidation and ablation of SiC coating on graphite prepared by chemical vapor reaction[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2013(Oct.):16-27. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%