Figure 4. Microstructure of Ti2CTX and Ti2CTX/Si3N4. (A) The XRD images of Ti2CTX and Ti2CTX/Si3N4; (B)The XPS images of Ti2CTX/Si3N4; (C) Si 2p XPS spectra; (D) N 1s XPS spectra; (E) C 1s XPS spectra; (F) Ti 2p XPS spectra. XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy.