Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7973985 | Materials Science and Engineering: A | 2018 | 28 Pages |
Abstract
3D needled (3DN) C/SiC fabricated through CVI has promising mechanical properties, though the low fiber content in the short-cut fiber layer results in large pores, which is hard to be filled and influences its mechanical properties. To solve this problem, this paper focuses on short-cut fiber layer of 3DN C/SiC preform and in-situ formation of MAX phase-based matrix with a joint process of slurry impregnation (SI) and reactive melt infiltration (RMI). The ratio of MAX phase to brittle phases in the matrix is adjusted through controlling the fabrication process. With the increase of MAX phase content, the advantages of the “strong” MAX phase with weak interface gradually emerge. The modification of MAX phase not only enriches toughening mechanism, but also elevates the bearing structure of 3DN C/SiC from one strong ply sandwiching three weak plies into three strong plies sandwiching one weak ply. Finally, 3DN C/SiC containing 15 vol.% Ti3Si(Al)C2 showed excellent mechanical properties, with flexural strength and fracture toughness up to 440 ± 17 MPa and 15.9 ± 1.4 MPa·m1/2, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yuzhao Ma, Xiaowei Yin, Xiaomeng Fan, Panfei Ju, Xiaolin Dang,