文章信息/Info

Title:

Current Technologic state of continuous silicon carbide filament

作者:

辛世煊

中國石油天然氣股份有限公司石油化工研究院 中國石油天然氣集團公司合成樹脂重點實驗室

Author(s):

Shixuan Xin

PetroChina Petrochemical Research Institute

PetroChina Sythetic Rsesin Key Laboratories

關鍵詞:

β-碳化硅（β-SiC）; 連續碳化硅長絲纖維（SiCF）; 聚硅烷(PS); 聚炭硅烷(PCS);  高溫熱解

DOI:

10.7502/j.issn.1674-3962.2014.05.07

文獻標志碼:

A

摘要:

連續炭化硅長絲纖維是目前具有最高比強度和最高比模量，以及高熱穩定性的人造纖維。連續炭化硅長絲纖維生產技術發展經歷了從高含氧量到超低含氧量，從微量元素參雜到復合連續炭化硅長絲纖維材料的幾個關鍵技術階段。本文重點探討連續炭化硅長絲纖維生產的四個關鍵技術工藝過程：即有機硅烷小分子單體經化學或催化聚合形成有機聚硅烷（PS）的聚合過程；PS的粘溶液或熔漿在惰性氣氛中機械紡絲制造PS原絲的工藝過程；PS原絲經過在惰性化學氣氛中控溫化學轉化形成聚炭硅烷（PCS）纖維及同時發生交聯的熱化學轉化過程；最后PCS纖維在惰性以及/或者反應性氣氛中高溫熱交聯結晶化形成終燒炭化硅（SiC）纖維的高溫熱化學轉化過程。熟悉并完全掌握每一個工藝過程的技術關鍵，才能有效選擇合適的工藝技術，選擇適當的工程技術生產裝備，生產出高強度高模量連續炭化硅長絲纖維，為我國航空航天以及高端制造業提供高品質炭化硅連續長絲纖維材料資源。

Abstract:

It is believed that the continuous silicon carbide filament is so far an artificial fiber that has highest tensile strength and the highest tensile modulus， as well as very high thermostability. Its production technology passed from high oxygen content to ultra-low oxygen content, and from trace element composites to multiple elements composites, several key progressive periods. This article focuses mainly on the four key processes of continuous silicon carbide (SiC) filament production technology. These are: the chemical or catalytic process that converting organosilane monomer into organo-polysilane (PS); the process of converting a viscous PS solution or molten PS into long and dry fibers，i.e filament fabrication; the process that converting the original PS filament into polycarbosialne (PCS) in an inert and/or chemical vapor environment under controlled temperatures; and finally the high temperature thermochemical cross-linking process of converting the PCS filament into highly crystalline SiC filament in an inert and/or chemical vapor environment under high temperature program. It is obvious that only if one could completely familiar with and rigorously grasp these key processes, one would be able to effectively select a suitable technical processes, to choose or create suitable manufactureing facilities, and therefore to be able to produce high strength and high modulus continuous silicon carbide filament. And then one would be able to provide high quality source of continuous silicon carbide filaments for the nation’s aero and space, as well as high performance manufacturing industries.