Polymer-derived SiCN and SiOC ceramics - structure and energetics at the nanoscale
Polymer-derived SiCN and SiOC ceramics - structure and energetics at the nanoscale
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DOI：
10.1039/c2ta00727d
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Riedel, Ralf
中科院分区：
文献类型：
--
作者：
Mera, Gabriela;Navrotsky, Alexandra;Riedel, Ralf
采用多核固体核磁共振、微区拉曼、小角X射线散射、X射线衍射、高分辨透射电子显微镜和高温氧化物熔体量热法研究了聚合物衍生的SiCN和SiOC陶瓷的复杂纳米畴结构和含能特性。与所有这些证据一致的结构模型强调了由混合键结构和纳米畴之间的界面键合稳定的互连分形畴。氢的结构和热力学的作用，以及在聚甲硅烷基马来酰亚胺衍生的SiCN的纳米畴之间的界面键合的稳定报道。
The complex nanodomain structure and energetic features of polymer-derived SiCN and SiOC ceramics have been investigated by multinuclear 1D and 2D solid-state NMR, micro-Raman, SAXS, XRD, HRTEM and oxidative high temperature oxide melt solution calorimetry, respectively. Structural models consistent with all these lines of evidence put emphasis on interconnected fractal domains stabilized by the mixed-bond-structure and interface bonding between nanodomains. The structural and thermodynamic role of hydrogen in the stabilization of interfacial bonding between the nanodomains in polysilylcarbodiimide-derived SiCN is reported as well.