Controllable distribution of reinforcements for reducing the strain energy in dissimilar ceramic/metal joints. Issue 2 (February 2021)

• Record Type: Journal Article
• Authors: Feng, Qinghua; Lin, Panpan; Lin, Tiesong; He, Peng; Liu, Yan; Long, Weimin; Li, Jian
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 2(2021)
• Page Start: 1076
• Page End: 1087
• Publication Date: 2021-02
• Subjects: Multi-layered joint architecture -- Controllable spatial distribution -- Thermal expansion mismatch -- Plastic deformation -- Strain energy; 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.2020.09.030
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: SiC Reinforcements are controlled to cluster together in the center of joint domain. Controllable spatial distribution of SiC realizes multi-layer architecture of joint. For ceramic/metal joint, multi-layer architecture relaxes strain energy in ceramic. For ceramic/metal joint, drop of strain energy in ceramic increases shear strength. Abstract: A novel design of a multi-layered joint architecture, characterized by the controllable spatial distribution of ceramic reinforcements, was obtained, when brazing ZrB2 -SiC ceramics and Ti-6Al-4 V reinforced by TiB whiskers with AgCu filler. To induce SiC reinforcements to cluster together, within the center of the filler and especially away from the ZrB2 -SiC, SiC was added into joint, in the form of a SiC interlayer featuring a 3D-bridged network structure with continuous micro-channels infiltrated by capillary force by liquid filler during brazing. Different SiC particles were connected together, by micro-bridges being not destroyed during brazing. The layer rich in SiC could reduce thermal expansion mismatch between different substrates, the AgCu next to the ZrB2 -SiC could relax the strain energy by high plastic deformation. Compared to joint brazed with single AgCu, joint strain energy decreased from 10.8 × 10 −6 J to 8.6 × 10 −6 J, accordingly joint shear strength increased from ∼5.4 MPa to ∼41.2 MPa.