Active brazing of carbon fiber reinforced SiC composite and 304 stainless steel with Ti–Zr–Be

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 617; pp. 66 - 72
• Main Authors: Fan, Dongyu, Huang, Jihua, Wang, Yihui, Chen, Shuhai, Zhao, Xingke
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 03-11-2014; Elsevier
• Subjects: 304 stainless steel; Applied sciences; Austenitic stainless steels; Brazed joints; Brazing; Brazing. Soldering; Cf/SiC composite; Condensed matter: structure, mechanical and thermal properties; Diffusion in solids; Diffusion layers; Exact sciences and technology; Interlayers; Joining, thermal cutting: metallurgical aspects; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Physics; Scanning electron microscopy; Silicon carbide; Stainless steels; Titanium; Titanium base alloys; Ti–Zr–Be foil; Transport properties of condensed matter (nonelectronic); Brazing; Cf/SiC composite; 304 stainless steel; Ti–Zr–Be foil; Interfacial layer; Interlayers; Scanning electron microscopy; C; Reaction product; SiC composite; Mechanical properties; Shear strength; Dispersive spectrometry; Brazed joint; X ray diffraction; Composite material; Mechanical test; Ti―Zr―Be foil; Stainless steel-304; Holding time; Vacuum brazing; Diffusion; Microstructure; Filler; Auger electron spectrometry; Carbon fiber
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2014.08.053

Carbon fiber reinforced SiC (Cf/SiC) was successfully joined to 304 stainless steel with Ti–Zr–Be filler metal by vacuum brazing. The interfacial microstructure was investigated by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), auger electron energy spectroscopy (AES) and X-diffraction (XRD). The mechanical properties of the brazed joints were measured by a mechanical testing machine. The results show that Ti and Zr elements in the interlayer can react with the brazed materials, the brazed joint mainly consists of Ti5Si3, TiSi, TiBe, TiFe and Zr(s,s) reaction products. The 304 stainless steel constantly dissolved and Ti, Be diffused into 304 stainless steel, which formed the diffusion layers between interlayer and 304 stainless steel. Ti and Be elements have an effect on promoting the formation of α-Fe layer. The maximum shear strength of 109.13±2.55MPa is obtained at 950°C with 60min holding time.