航天推进技术研究院主办
[1]张万卿,李洪春,马海瑞.碳纤维增强聚四氟乙烯材料微观结构[J].火箭推进,2019,45(02):74-78.
ZHANG Wanqing,LI Hongchun,MA Hairui.Microstructure of carbon fiber-reinforced PTFE[J].Journal of Rocket Propulsion,2019,45(02):74-78.
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ZHANG Wanqing,LI Hongchun,MA Hairui.Microstructure of carbon fiber-reinforced PTFE[J].Journal of Rocket Propulsion,2019,45(02):74-78.
碳纤维增强聚四氟乙烯材料微观结构
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
45
期数:
2019年02期
页码:
74-78
栏目:
工艺与材料
出版日期:
2019-04-30
- Title:
- Microstructure of carbon fiber-reinforced PTFE
- 文章编号:
- 1672-9374(2019)02-0074-05
- 关键词:
- 碳纤维增强聚四氟乙烯材料; 微观结构; 缺陷
- 分类号:
- V254
- 文献标志码:
- A
- 摘要:
- 为了研究碳纤维增强聚四氟乙烯材料的最佳加工工艺,采用扫描电镜对碳纤维增强聚四氟乙烯材料的微观结构形貌进行了观察,并对碳纤维增强聚四氟乙烯材料的结晶形态和成型后毛坯的内部微观缺陷进行了对比研究和分析。研究表明:碳纤维增强聚四氟乙烯毛坯表面存在“球状结晶”,无缺陷的毛坯内部不会产生“球状结晶”; 碳纤维增强聚四氟乙烯毛坯内部的气孔、分层缺陷在冷压过程中形成。减少碳纤维增强聚四氟乙烯粉料的团聚,能有效减少成型后毛坯内部气孔缺陷的产生; 碳纤维增强聚四氟乙烯材料冷压时适当降低压制压力,能有效减少分层缺陷的产生。
- Abstract:
- In order to study the optimal processing technology of carbon fiber-reinforced polytetrafluoro-ethylene(PTFE)materials, the microstructure of carbon fiber-reinforced PTFE materials was observed by scanning electron microscopy.The crystal morphology of carbon fiber-reinforced PTFE and the microscopic defects inside the blank after molding were compared and analyzed.Through the study of the microstructure of carbon fiber-reinforced PTFE materials, the purpose of determining the best processing technology is achieved.Studies have shown that “spherical crystals” exist on the surface of carbon fiber reinforced PTFE blanks, and no “spherical crystals” are produced inside the non-defective blanks.The pores and delamination defects inside the carbon fiber-reinforced PTFE blank are formed during the cold pressing process.Reducing the agglomeration of carbon fiber-reinforced PTFE powder can effectively reduce the generation of air hole defects in the blank after forming.Reducing the pressuring pressure of carbon fiber-reinforced PTFE material when it is cold pressed can effectively reduce the occurrence of delamination defects.
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备注/Memo
收稿日期:2018-05-06; 修回日期:2018-09-11 基金项目:国家社会科学基金艺术学项目(18CG199) 作者简介:张万卿(1989—),男,硕士,研究领域为材料学
更新日期/Last Update:
2019-04-30