Fig. 4. XRD spectra of the MZY15/SiC (spectrum ‘‘(a)’’), MZY25/SiC (spectrum ‘‘(b)’’), and MZY50/SiC (spectrum ‘‘(c)’’) composites, all after exposure at 1200°C for 500 h. (M4 mullite, Z 4 zircon, C4 cristobalite, m4 m-ZrO2, t 4 t-ZrO2, and S4 SiC.)
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