On the onset of fracture as a silicon‐based polymer converts into the ceramic phase
On the onset of fracture as a silicon‐based polymer converts into the ceramic phase
复制标题
当硅基聚合物转变为陶瓷相时断裂开始
DOI：
10.1111/jace.16089
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发表时间：
2018
影响因子：
3.9
通讯作者：
Soraru, Gian Domenico
中科院分区：
文献类型：
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作者：
Raj, Rishi;Pederiva, Luca;Narisawa, Masaki;Soraru, Gian Domenico
硅基聚合物在逐渐加热至约1000°C时演变成耐火陶瓷。转化伴随着气态物质的损失，以及密度的两倍增加。如果加热速率太高或试样太厚，收缩会产生微裂纹。该通信建立在早期工作的基础上，其中气体析出的测量及其与粘性流动的关系与圆盘形绿色（聚合物）样品中的断裂开始有关。开始被确定为磁盘的厚度和加热速率的函数。结果以加工图的形式呈现。气体析出和应变率测量的叠加表明，断裂始于氢气和甲烷的释放，始于接近750°C的温度。
Silicon‐based polymers evolve into refractory ceramics when heated gradually up to ~1000°C. The conversion is accompanied by the loss of gaseous species, and by a two‐fold increase in density. The shrinkage can produce microcracks if the heating rate is too high, or if the specimen is too thick. This communication builds on earlier work whereby the measurement of gas evolution, and its relationship with viscous flow, are related to the onset of fracture in disk‐shaped green (polymer) samples. The onset is determined as a function of the thickness of the disks, and of the heating rate. The results are presented in the form of a processing map. The overlay with gas evolution, and strain‐rate measurements, suggest that fracture initiates with the release of hydrogen and methane, starting at temperatures near 750°C.
机械工程设计：J.E. Shigley 和 C.R. Mischke，McGraw-Hill，1989 年。第 5 版，ISBN 0-07-100607-9，779 页，17.95 英镑
DOI：
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发表时间：
1994
期刊：
影响因子：
--
作者：
K. L. Edwards
通讯作者：
K. L. Edwards
关于薄膜和块体成分热解过程中的收缩：SiOC 玻璃的杂化硅胶前体的案例
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
G. Sorarù;A. Karakuscu;C. Boissière;F. Babonneau
通讯作者：
F. Babonneau