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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Precursor ceramic high-temperature sensing material containing in-situ anti-oxidation coating and preparation method of precursor ceramic high-temperature sensing material
The invention belongs to the technical field of sensor materials, and discloses a precursor ceramic high-temperature sensing material containing an in-situ anti-oxidation coating and a preparation method thereof.The precursor ceramic high-temperature sensing material comprises a raw material layer, and a transition layer and the anti-oxidation coating are sequentially arranged on the outer side of the raw material layer; the preparation method comprises the following steps: forming and pyrolyzing a polymer precursor to obtain the raw material layer; the transition layer is obtained through a temperature gradient constructed by laser; the anti-oxidation coating is obtained through an in-situ carbon thermal reduction reaction under the laser surface heating effect; a surface gradient temperature field is constructed based on the surface heating effect of laser, surface free carbon is consumed by combining carbon thermal reduction reaction of precursor ceramic at high temperature, and in-situ preparation of the high-temperature-resistant and high-electrical-impedance oxidation coating is achieved. The gradient temperature field constructed by laser not only can realize in-situ preparation of the anti-oxidation coating, but also can ensure gradient transition of components, and can effectively relieve thermal stress caused by mismatching of thermal expansion coefficients.
本发明属于传感器材料技术领域，公开了一种含原位抗氧化涂层的前驱体陶瓷高温传感材料及制备方法，包括原材料层，原材料层的外侧依次设有过渡层、抗氧化涂层；其制备方法为：原材料层通过聚合物前驱体的成型及热解制得；过渡层通过激光构建的温度梯度获取；抗氧化涂层在激光表面加热作用下的原位碳热还原反应获得；本发明基于激光的表面加热效应构筑表面梯度温度场，结合前驱体陶瓷在高温下的碳热还原反应消耗表面自由碳，实现耐高温、高电阻抗氧化涂层的原位制备。激光构筑的梯度温度场不仅能够实现抗氧化涂层的原位制备，还能保证成分的梯度过渡，可以有效缓解由于热膨胀系数不匹配引起的热应力。
Precursor ceramic high-temperature sensing material containing in-situ anti-oxidation coating and preparation method of precursor ceramic high-temperature sensing material
The invention belongs to the technical field of sensor materials, and discloses a precursor ceramic high-temperature sensing material containing an in-situ anti-oxidation coating and a preparation method thereof.The precursor ceramic high-temperature sensing material comprises a raw material layer, and a transition layer and the anti-oxidation coating are sequentially arranged on the outer side of the raw material layer; the preparation method comprises the following steps: forming and pyrolyzing a polymer precursor to obtain the raw material layer; the transition layer is obtained through a temperature gradient constructed by laser; the anti-oxidation coating is obtained through an in-situ carbon thermal reduction reaction under the laser surface heating effect; a surface gradient temperature field is constructed based on the surface heating effect of laser, surface free carbon is consumed by combining carbon thermal reduction reaction of precursor ceramic at high temperature, and in-situ preparation of the high-temperature-resistant and high-electrical-impedance oxidation coating is achieved. The gradient temperature field constructed by laser not only can realize in-situ preparation of the anti-oxidation coating, but also can ensure gradient transition of components, and can effectively relieve thermal stress caused by mismatching of thermal expansion coefficients.
本发明属于传感器材料技术领域，公开了一种含原位抗氧化涂层的前驱体陶瓷高温传感材料及制备方法，包括原材料层，原材料层的外侧依次设有过渡层、抗氧化涂层；其制备方法为：原材料层通过聚合物前驱体的成型及热解制得；过渡层通过激光构建的温度梯度获取；抗氧化涂层在激光表面加热作用下的原位碳热还原反应获得；本发明基于激光的表面加热效应构筑表面梯度温度场，结合前驱体陶瓷在高温下的碳热还原反应消耗表面自由碳，实现耐高温、高电阻抗氧化涂层的原位制备。激光构筑的梯度温度场不仅能够实现抗氧化涂层的原位制备，还能保证成分的梯度过渡，可以有效缓解由于热膨胀系数不匹配引起的热应力。
Precursor ceramic high-temperature sensing material containing in-situ anti-oxidation coating and preparation method of precursor ceramic high-temperature sensing material
含原位抗氧化涂层的前驱体陶瓷高温传感材料及制备方法
NIU JIAHONG (Autor:in) / WU SHUAIHAO (Autor:in) / JIA HAONAN (Autor:in) / HUANG LEIYU (Autor:in)
31.10.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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