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发明公开
CN102815927A 一种六铝酸盐高发射率热防护涂层及其制备方法 失效 - 权利终止

一种六铝酸盐高发射率热防护涂层及其制备方法
摘要：
一种六铝酸盐高发射率热防护涂层及其制备方法，它涉及热防护涂层及其制备方法。本发明是要解决现有高发射率热防护涂层存在的抗热冲击性差，热膨胀失配及短波段内发射率低的问题。本发明制备的热防护涂层化学式LaMg1-xMxAl11O19，M为Mn、Fe、Co或Ni，0≤x≤1。制备方法：一、制备LaMg1-xMxAl11O19喂料；二、制备高温合金板材基体；三、在基体上制备NiCoCrAlYTa结合层；四、在覆层基体上制备LaMg1-xMxAl11O19六铝酸盐高发射率热防护涂层。本发明制备的热防护涂层在的法向光谱发射率在7~14μm波段内大于0.9。本发明适用于金属材料热防护涂层的生产。
摘要（英）：

The invention provides a hexaaluminate high-emissivity thermal protection coating layer and a preparation method of the hexaaluminate high-emissivity thermal protection coating layer, and relates to a thermal protection coating layer and a preparation method of the thermal protection coating layer, aiming at solving the problem that the existing high-emissivity thermal protection coating layer ispoor in thermal shock resistance, mismatched in thermal expansion and low in emissivity within a short-wave band. The thermal protection coating layer prepared by the invention has the chemical formula as shown in LaMg1-xMxAl11O19, wherein M is Mn, Fe, Co or Ni, x is larger than or equal to 0 and is less than or equal to 1. The preparation method comprises the following steps of: 1, preparing LaMg1-xMxAl11O19 feed material; 2, preparing a high-temperature alloy plate material base body; 3, preparing a NiCoCrAlYTa combination layer on the base body; and 4, preparing the LaMg1-xMxAl11O19 hexaaluminate high-emissivity thermal protection coating layer on the coating base body. The normal spectral emissivity of the thermal protection coating layer prepared by the invention is larger than 0.9 within the wave band of 7-14 mu m. The invention is suitable for the preparation of the metal material thermal protection coating layer.

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