含硼氧化铝基陶瓷连续纤维的制备技术  

Preparation of the Boron-containing Alumina-based Continuous Ceramic Fibers

作　　者：梁可可 贾玉娜[1] 陈代荣[1] 曹旭[2] 焦秀玲[1] LIANG Keke;JIA Yuna;CHEN Dairong;CAO Xu;JIAO Xiuling(National Engineering Research Center for Colloidal Materials,Shandong University,Jinan 250100;Beijing Institute of Space Mechanics&Electricity,Beijing 100076)

机构地区：[1]山东大学国家胶体材料工程技术研究中心,济南250100 [2]北京空间机电研究所,北京100076

出　　处：《宇航材料工艺》2020年第4期39-43,共5页Aerospace Materials & Technology

摘　　要：针对我国对氧化铝基陶瓷连续纤维的研制需求,通过溶胶-凝胶法结合干法纺丝制备了含硼氧化铝基陶瓷连续纤维,主要研究了纺丝助剂含量对溶胶可纺性的影响以及纤维陶瓷化过程中物相及微观结构的演变规律。结果表明:当纺丝助剂PVA含量为1.5%时,通过干法纺丝得到的含硼氧化铝基凝胶连续纤维可达1.8 km,将凝胶纤维进行陶瓷化后形成的陶瓷连续纤维直径均匀,为12~14μm,经1 000℃烧结后纤维主晶相为γ-Al2O3,具有优异的力学性能,拉伸强度和模量分别可达2.0 GPa和149 GPa,在1 100℃煅烧1 h后纤维强度保留率可达93%,在航空航天及先进制造业等领域具有潜在的应用前景。Aim at the urgent requirements of alumina-based continuous ceramic fibers,boron-containing alumina-based continuous fibers were prepared through a sol-gel combined dry spinning technique. The effect of the content of spinning additive on the spinnability of the sol and the evolution of the phase composition and microstructure of the fibers during the ceramization were investigated. The results indicate that the gel fibers is lengthen up to 1. 8 km can be obtained with the PVA content of 1. 5%. After ceramization,the ceramic fibers with the uniform diameter of 12 to 14 μm can be formed. The fibers obtained at 1 000 ℃ are composed of the crystalline γ-Al2 O3 and amorphous phase. These fibers exhibit high tensile strength and modulus up to 2. 0 GPa and 149 GPa,respectively. After calcined at 1 100 ℃ for 1 h,the fiber still can retain 93% of the original tensile strength. The asprepared fibers show great potential in the area of aerospace and advanced manufacturing industry.

关 键 词：氧化铝基陶瓷连续纤维 溶胶凝胶法 干法纺丝 

分 类 号：TB321[一般工业技术—材料科学与工程]