Data for: High-temperature properties and interface evolution of C/SiBCN composites prepared by precursor infiltration and pyrolysis

It is evident that the peaks of N2 (mass: 28) or volatile Si (mass: 28) has been be detected on mass spectra. It can be inferred that the N2 and volatile Si are attributed to the reaction of Si_3 N_4+3C→3SiC+2N_2 and Si_3 N_4→3Si(g)+2N_2. The peak of NH3 (mass: 17) may be due to small amount of transamination reaction between N-H group in the precursor backbone and Si-N linkages. And the peaks of H2O (mass: 18), CO2 (mass: 44), NO2 (mass: 46) appeared, because a small amount of oxygen introduced during the PIP process reacted with the SiBCN matrix.显而易见，在质谱（mass spectra）中可检测到质量数为28的氮气（N₂）峰与挥发性硅（volatile Si）峰。据此可推断，氮气与挥发性硅源自如下两个反应：Si₃N₄ + 3C → 3SiC + 2N₂，以及Si₃N₄ → 3Si(g) + 2N₂。 质量数为17的氨气（NH₃）峰，可能源于前驱体骨架中的N-H基团与Si-N键之间发生的少量转氨反应。此外还出现了质量数分别为18的水（H₂O）、44的二氧化碳（CO₂）、46的二氧化氮（NO₂）峰，这是因为PIP工艺过程中引入的少量氧气与SiBCN基体发生了反应。