陶瓷纤维长度对复合精铸型壳抗弯强度与透气性的影响及增强行为

发布时间：2018-01-03 12:33

本文关键词：陶瓷纤维长度对复合精铸型壳抗弯强度与透气性的影响及增强行为　出处：《复合材料学报》2017年04期 　论文类型：期刊论文

【摘要】：为了分析纤维长度对陶瓷纤维增强硅溶胶型壳抗弯强度与透气性的影响及增强行为,采用1~6mm六种不同长度陶瓷纤维制备硅溶胶型壳试样。研究结果表明,陶瓷纤维长度对硅溶胶型壳强度和透气性的影响显著,随着陶瓷纤维长度的增加,型壳的抗弯强度先增大后减少,型壳的透气率先增大后减小再增大。当陶瓷纤维长度为4mm时,型壳的常温及焙烧后抗弯强度达到最大值,分别为2.97 MPa和6.84 MPa;型壳的透气率达到最大值2.90。当陶瓷纤维长度大于4mm时,纤维在型壳中分散性变差,纤维的桥联作用得不到有效发挥,型壳孔隙率减少,导致型壳强度和透气性变小。
[Abstract]:In order to analyze the fiber length of ceramic fiber reinforced silica sol shell bending strength and permeability effect and enhanced behavior, using 1~6mm six different length of ceramic fiber preparation of silica sol shell samples. The results show that the ceramic fiber length had significant effects on the permeability and strength of silica sol shell, with the increase of ceramic fiber the length of the bending strength of the shell first increase and then decrease, permeability first increases and then decrease and then increase shell. When the ceramic fiber length is 4mm, room temperature and roasting shell after the bending strength reaches the maximum value, respectively 2.97 MPa and 6.84 MPa; the permeability reaches the maximum value when the ceramic fiber 2.90. the length is more than 4mm type shell, fiber dispersion variation in the shell, the fiber bridging effect is not effective, the shell porosity decreases, cause shell strength and permeability decreases.

【作者单位】：南昌航空大学轻合金加工科学与技术国防重点科学实验室;
【基金】：江西省自然科学基金(20142BAB216024) 轻合金加工科学与技术国防重点学科实验室开放课题研究基金(gf201401004) 航空基金(2015ZE56015)
【分类号】：TQ174.758.21;TB332
【正文快照】： 网络出版地址:www.cnki.net/kcms/detail/11.1801.TB.20160720.0801.002.html引用格式:芦刚,纪超众,严青松,等.陶瓷纤维长度对复合精铸型壳抗弯强度与透气性的影响及增强行为[J].复合材料学报,2017,34(4):865-872.LU G,JI C Z,YAN Q S,et al.Effects and enhanced behavior of

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