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- Title
Interface microstructure and shear strength in the diffusion brazing joint of TiC–Al<sub>2</sub>O<sub>3</sub> ceramic composite with W18Cr4V tool steel.
- Authors
Wang Juan; Li Yajian; Huang Wanqun
- Abstract
The diffusion brazing of TiC–Al2O3 ceramic composite with W18Cr4V tool steel is realized by using Ti and Cu filler metals at 1500°K for 1 h under a pressure of 15 MPa in a vacuum of 10–5 Pa. Thus, a brazed TiC–Al2O3/W18Cr4V joint was obtained with an interface shear strength of up to 105 MPa. The microstructural characteristics of the TiC–Al2O3/ W18Cr4V joint are studied by using a scanning electron microscope (SEM) with energy-dispersion spectroscopy (EDS) and X-ray diffractometer (XRD). The results indicated that the interface layer with a thickness of 90 μm was formed between TiC–Al2O3 and W18Cr4V steel. The Ti and Cu filler metals were completely fused and diffused to react with Al and C from the substrates, whereas Ti3Al, Ti3AlC2, TiC, and CuTi2 were produced in the TiC–Al2O3/W18Cr4V joint.
- Subjects
MICROSTRUCTURE; CERAMIC materials; DIFFUSION bonding (Metals); SCANNING electron microscopes; SPECTRUM analysis; X-ray diffractometers; INTERFACES (Physical sciences)
- Publication
Materials Science, 2009, Vol 45, Issue 1, p125
- ISSN
1068-820X
- Publication type
Article
- DOI
10.1007/s11003-009-9165-8