High char yield BPR modified with ZrSi2 and B4C: Pyrolysis kinetic behavior and structure evolution

被引：9
作者：
Zhu, Di [1 ]
Huang, Zhixiong [1 ]
Shi, Minxian [1 ]
Qin, Yan [1 ]
Zou, Zhenyue [1 ]
Deng, Zongyi [1 ]
机构：
[1] Wuhan Univ Technol, Key Lab Special Funct Mat Technol Educ, Wuhan 430070, Peoples R China
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2023年 / 148卷 / 03期
关键词：
Boron-containing phenolic resin; Pyrolysis kinetics; Thermal stability; RAY PHOTOELECTRON-SPECTROSCOPY; JANAF THERMOCHEMICAL TABLES; CARBON-PHENOLIC COMPOSITES; THERMAL-STABILITY; DEGRADATION KINETICS; ABLATION RESISTANCE; RESIN; BORON; MECHANISM; OXYGEN;
D O I：
10.1007/s10973-022-11722-9
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
BPR has been widely used as ablative material for thermal protection on aircraft surface. In this study, model-free method was employed to study the kinetic models of BPR and ZrSi2/B4C-Ph composite. In addition, the thermal stability, chemical reaction and structure evolution during pyrolysis of ZrSi2/B4C-Ph composite were characterized by TGA, XRD, XPS, GC-MS and TG-MS. The results indicated that the pyrolysis of BPR includes three consecutive and overlapping stages. And the kinetic mechanism function f(alpha), apparent activation energy E-a and pre-exponential factor A of each stage were confirmed. Besides, the high char yield of ZrSi2/B4C-Ph composite is mainly attributed to the reaction of ZrSi2 and B4C with gases released during BPR pyrolysis, which formed solid phases such as amorphous carbon, ZrO2, SiO2 and B2O3.
引用
收藏
页码：789 / 805
页数：17
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