Effect of E-44 Epoxy Resin and Pyrolysis Temperature on the Adhesion Strength of SiBCN Ceramic

An adhesive of the SiBCN ceramic was synthesized through the polymer derived ceramics (PDC) route. Meanwhile with higher adhesion strength and simpler process condition, the polyborosilazane (PSNB) was modified by E-44 epoxy resin. The E-44 epoxy resin was used to promote the oxidation process of SiBCN, in other words, to produce more amount of SiO2-B2O3 glasses. The phase composition, elemental analysis, chemical bonds and microstructure were investigated by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) measurements. The E-44 modified adhesives were cured at 120 °C in air for 2 h, and were pyrolyzed at 1 200, 1 400, and 1 500 °C for 2 h in air, respectively. The highest adhesion strength of the modified adhesive was up to 5.33, 12.23, and 12.50 MPa after being heat treated at 1 200, 1 400, and 1 500 °C, respectively. Finally, we proposed an adhesion model and revealed the adhesion mechanism of SiBCN ceramic.