Mechanical investigation of weak regions in a wound oxide-oxide ceramic matrix composite. Issue 15 (December 2018)

• Record Type: Journal Article
• Authors: Vasechko, Viacheslav; Flucht, Ferdinand; Rahner, Nils
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 15(2018)
• Page Start: 5192
• Page End: 5199
• Publication Date: 2018-12
• Subjects: Ceramic matrix composite -- Mechanical properties -- Strength -- Failure analysis -- Fractography; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2018.05.009
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The main aim of the investigation was to quantify the influence of production-related cross-lines on static mechanical properties (tensile, flexural and shear) of an oxide-oxide CMC as a comparison between specimens with cross-lines and specimens without cross-lines in tested regions. Investigated material was a weak-matrix oxide-oxide CMC (WHIPOX™) made of Nextel™ 610 fibers (3000 denier) and alumina matrix with a special winding pattern. Mechanical tests at room temperature revealed that cross-lines were local weak regions in a wound component. Spatial separation of the cross-line within the composite (2 mm shift from layer to layer) did not improve the negative influence of the cross-lines on mechanical properties. Fractographic investigations revealed that cross-lines acted as a trigger of material failure.