Polymer-derived ceramics (PDCs) are fabricated through the controlled pyrolysis of silicon-based polymeric precursors. Their structure, and subsequent material responses, are highly dependent on the chemistry of the pre-ceramic polymer, the pyrolysis atmosphere, and the pyrolysis or annealing temperatures. Future development of PDCs and their integration into society will rely heavily on understanding the connection between these variables and their subsequent material performance. In this review, the nanostructural development of silicon carbonitride (SiCN) and silicon oxycarbide (SiOC) ceramics, along with a selection of their chemically or physically modified structures, is presented. The chemistry and processing parameters of these PDCs will be explored in relation to their amorphous and crystalline characteristics, including phase transitions and transition temperatures. The microstructure of these systems is also presented in conjunction with the nanostructure where necessary. The structural properties of SiCN and SiOC PDCs are related to the mechanical responses of these systems, which provides an overview of the design parameters needed to realize a PDC from theory to application.

中文翻译：

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SiCN和SiOC聚合物衍生的陶瓷纳米结构的演变及其对机械性能的影响的综述

聚合物衍生的陶瓷（PDC）是通过对硅基聚合物前驱体进行受控热解而制成的。它们的结构和随后的材料响应在很大程度上取决于陶瓷前聚合物的化学性质，热解气氛以及热解或退火温度。PDC的未来发展及其与社会的融合将在很大程度上取决于对这些变量及其后续物质绩效之间关系的理解。在这篇综述中，介绍了碳氮化硅（SiCN）和碳氧化硅（SiOC）陶瓷的纳米结构发展，以及它们的化学或物理改性结构的选择。这些PDC的化学和加工参数将根据其非晶和晶体特性进行研究，包括相变和转变温度。这些系统的微结构在必要时还会与纳米结构一起呈现。SiCN和SiOC PDC的结构特性与这些系统的机械响应有关，这从理论到应用概述了实现PDC所需的设计参数。