CN108239737A - 热障涂层制备方法 - Google Patents
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Abstract
热障涂层制备方法。由于飞机发动机热端组件的工作温度可高达1350 ℃,因此需要用到许多先进结构材料制备热障涂层(TBCs)来冷却发动机热端组件。一种使用纳米CYSZ陶瓷层材料,其熔点达2700 ℃;热导率为1.29W·m‑1·K‑1,热膨胀系数为11×10‑6 ℃‑1,其低密度(6.4 g/cm3)可以减轻发动机质量;低弹性模量可以减少热应力;用共沉淀法制备CeO2—Y2O3共稳定的CYSZ纳米陶瓷粉末,再对CYSZ纳米粉喷雾造粒后,采用等离子喷涂技术方法制备纳米CYSZ陶瓷热障涂层,将稀土材料与纳米材料独有的特点与热障涂层材料相结合,通过研究得到热障涂层微观组织与宏观性能之间的关系,使CeO2—Y2O3共稳定的CYSZ热障涂层很好地应用于工作温度不断提高的发动机热端部件。本发明用于等离子热喷涂法制备的发动机构件表面。
Description
技术领域:
本发明涉及一种喷涂防护与发动机热防护领域,尤其涉及一种热障涂层制备方法。
背景技术:
由于飞机发动机热端组件的工作温度可高达1350 ℃,因此需要用到许多先进结构材料制备热障涂层(TBCs)来冷却发动机热端组件;热障涂层把热端组件从大量持续的热负荷中隔离出来,使负载合金与涂层表面之间存在可承受的温差;因此,热障涂层应具有较高的相稳定性避免由相变引起体积变化、较低的热导率以保护基体免受高温侵蚀、较好的热震性能以延长涂层使用寿命;目前,等离子喷涂制备YSZ涂层的研究在很多文献中都有记载,但对采用共沉淀法制备CeO2稳定YSZ(CYSZ)纳米陶瓷粉末并大气等离子喷涂成热障涂层的研究却很少。
发明内容:
本发明的目的是提供一种热障涂层制备方法。
上述的目的通过以下的技术方案实现:
热障涂层制备方法,使用纳米CYSZ陶瓷层材料,其熔点达2700 ℃;热导率为1.29W·m-1·K-1,低热导率,可提高陶瓷层隔热性能,热膨胀系数为11×10-6 ℃-1,可以减少金属基体与陶瓷层之间热膨胀系数不匹配产生的应力;其低密度(6.4 g/cm3)可以减轻发动机质量;低弹性模量可以减少热应力;较高硬度(1350.8 HV)使得CYSZ材料具有优良的耐磨性与耐腐蚀性,高的抗热震性使得CYSZ具有优异的热稳定性,更适合发动机热端部件高温环境的应用,用共沉淀法制备CeO2—Y2O3共稳定的CYSZ纳米陶瓷粉末,再对CYSZ纳米粉喷雾造粒后,采用等离子喷涂技术方法制备纳米CYSZ陶瓷热障涂层,将稀土材料与纳米材料独有的特点与热障涂层材料相结合,通过研究得到热障涂层微观组织与宏观性能之间的关系,使CeO2—Y2O3共稳定的CYSZ热障涂层很好地应用于工作温度不断提高的发动机热端部件;所述的纳米CYSZ陶瓷热障涂层的材质为:以ZrOCl2·8H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,以NH3·H2O作沉淀剂,以PEG-6000作分散剂,经水浴搅拌、陈化、抽滤、水洗醇洗、混合沉淀等工序处理,再经研磨、干燥处理,将得到的物质与氢氧化物混合后经煅烧,得CYSZ复合纳米粉;将CYSZ复合纳米粉加入粘合剂PVA和去离子水,进行球磨,再通过喷雾造粒团聚成球形粉末,对造粒后的球形粉末干燥,脱去PVA;采用等离子喷涂设备,在合金钢(35Cr2Ni4MoA)基体上喷涂粘结层(450NS镍铝粉)和造粒后的CYSZ陶瓷复合纳米粉,得到纳米CYSZ陶瓷热障涂层。
所述的热障涂层制备方法,涂层包括高温合金基体、Ni/Al粘结层和纳米CYSZ陶瓷热障涂层,所述的高温合金基体表面连接Ni/Al粘结层,所述的Ni/Al粘结层连接纳米CYSZ陶瓷热障涂层。
所述的热障涂层制备方法,所述的高温合金基体表面需采用24目白刚玉砂,进行喷砂处理,使基体表面粗糙度≥4μm,再喷涂连接Ni/Al粘结层,所述的喷涂Ni/Al粘结层和所述的喷涂纳米CYSZ陶瓷热障涂层的厚度分别为100μm和200μm。
所述的热障涂层制备方法所述的高温合金基体即为发动机热端组件,其材质为35Cr2Ni4MoA合金结构钢。
所述的热障涂层制备方法,所述的Ni/Al粘结层材料为450NS镍铝粉末(80 %Ni和20 %Al)。
本发明的有益效果:
1.本发明的热障涂层,使用纳米CYSZ陶瓷热障涂层的优点是:增加发动机的功率密度,燃料效率,并提高发动机的安全可靠性。
本发明的热障涂层,使用纳米CYSZ陶瓷层材料,其熔点达2700 ℃;热导率为1.29W·m-1·K-1,低热导率,可提高陶瓷层隔热性能,热膨胀系数为11×10-6 ℃-1,可以减少金属基体与陶瓷层之间热膨胀系数不匹配产生的应力;其低密度(6.4 g/cm3)可以减轻发动机质量;低弹性模量可以减少热应力;较高硬度(1350.8 HV)使得CYSZ材料具有优良的耐磨性与耐腐蚀性,高的抗热震性使得CYSZ具有优异的热稳定性,更适合发动机热端部件高温环境的应用。
本发明的热障涂层,目的是用共沉淀法制备CeO2—Y2O3共稳定的CYSZ纳米陶瓷粉末,再对CYSZ纳米粉喷雾造粒后,采用等离子喷涂技术方法制备纳米CYSZ陶瓷热障涂层,将稀土材料与纳米材料独有的特点与热障涂层材料相结合,通过研究得到热障涂层微观组织与宏观性能之间的关系,使CeO2—Y2O3共稳定的CYSZ热障涂层很好地应用于工作温度不断提高的发动机热端部件。
附图说明:
附图1是本发明的结构示意图。
附图2是本发明的制备纳米陶瓷粉末的工艺路线图。
附图3是本发明的纳米CYSZ陶瓷粉末喷雾造粒工艺流程图。
图中:1 —高温合金基体;2 — Ni/Al粘结层;3 —纳米CYSZ陶瓷热障涂层。
具体实施方式:
实施例1:
热障涂层制备方法,使用纳米CYSZ陶瓷层材料,其熔点达2700 ℃;热导率为1.29W·m-1·K-1,低热导率,可提高陶瓷层隔热性能,热膨胀系数为11×10-6 ℃-1,可以减少金属基体与陶瓷层之间热膨胀系数不匹配产生的应力;其低密度(6.4 g/cm3)可以减轻发动机质量;低弹性模量可以减少热应力;较高硬度(1350.8 HV)使得CYSZ材料具有优良的耐磨性与耐腐蚀性,高的抗热震性使得CYSZ具有优异的热稳定性,更适合发动机热端部件高温环境的应用,用共沉淀法制备CeO2—Y2O3共稳定的CYSZ纳米陶瓷粉末,再对CYSZ纳米粉喷雾造粒后,采用等离子喷涂技术方法制备纳米CYSZ陶瓷热障涂层,将稀土材料与纳米材料独有的特点与热障涂层材料相结合,通过研究得到热障涂层微观组织与宏观性能之间的关系,使CeO2—Y2O3共稳定的CYSZ热障涂层很好地应用于工作温度不断提高的发动机热端部件。
实施例2:
所述的热障涂层制备方法,所述的Ni/Al粘结层材料为450NS镍铝粉末(80 %Ni和20 %Al)。
所述的热障涂层制备方法,其组成包括:高温合金基体、Ni/Al粘结层和纳米CYSZ陶瓷热障涂层,所述的高温合金基体1表面连接Ni/Al粘结层2,所述的Ni/Al粘结层连接纳米CYSZ陶瓷热障涂层3。
实施例2:
所述的热障涂层制备方法,所述的高温合金基体表面需采用24目白刚玉砂,进行喷砂处理,使基体表面粗糙度≥4μm,再喷涂连接Ni/Al粘结层,所述的喷涂Ni/Al粘结层和所述的喷涂纳米CYSZ陶瓷热障涂层的厚度分别为100μm和200μm。
实施例3:
根据权利要求1所述的热障涂层制备方法,所述的高温合金基体即为发动机热端组件,其材质为35Cr2Ni4MoA合金结构钢。
实施例4:
根据权利要求1所述的热障涂层制备方法,所述的Ni/Al粘结层材料为450NS镍铝粉末(80 %Ni和20 %Al)。
所述的纳米CYSZ陶瓷热障涂层的材质为:以ZrOCl2·8H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,以NH3·H2O作沉淀剂,以PEG-6000作分散剂,经水浴搅拌、陈化、抽滤、水洗醇洗、混合沉淀等工序处理,再经研磨、干燥处理,将得到的物质与氢氧化物混合后经煅烧,得CYSZ复合纳米粉;将CYSZ复合纳米粉加入粘合剂PVA和去离子水,进行球磨,再通过喷雾造粒团聚成球形粉末,对造粒后的球形粉末干燥,脱去PVA;采用等离子喷涂设备,在合金钢(35Cr2Ni4MoA)基体上喷涂粘结层(450NS镍铝粉)和造粒后的CYSZ陶瓷复合纳米粉,得到纳米CYSZ陶瓷热障涂层。
Claims (5)
1.一种热障涂层制备方法,其特征是:所述的纳米CYSZ陶瓷热障涂层的材质为:以ZrOCl2·8H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,以NH3·H2O作沉淀剂,以PEG-6000作分散剂,经水浴搅拌、陈化、抽滤、水洗醇洗、混合沉淀等工序处理,再经研磨、干燥处理,将得到的物质与氢氧化物混合后经煅烧,得CYSZ复合纳米粉;将CYSZ复合纳米粉加入粘合剂PVA和去离子水,进行球磨,再通过喷雾造粒团聚成球形粉末,对造粒后的球形粉末干燥,脱去PVA;采用等离子喷涂设备,在合金钢(35Cr2Ni4MoA)基体上喷涂粘结层(450NS镍铝粉)和造粒后的CYSZ陶瓷复合纳米粉,得到纳米CYSZ陶瓷热障涂层;
使用纳米CYSZ陶瓷层材料,其熔点达2700 ℃;热导率为1.29W·m-1·K-1,低热导率,可提高陶瓷层隔热性能,热膨胀系数为11×10-6 ℃-1,可以减少金属基体与陶瓷层之间热膨胀系数不匹配产生的应力;其低密度(6.4 g/cm3)可以减轻发动机质量;低弹性模量可以减少热应力;较高硬度(1350.8 HV)使得CYSZ材料具有优良的耐磨性与耐腐蚀性,高的抗热震性使得CYSZ具有优异的热稳定性,更适合发动机热端部件高温环境的应用,用共沉淀法制备CeO2—Y2O3共稳定的CYSZ纳米陶瓷粉末,再对CYSZ纳米粉喷雾造粒后,采用等离子喷涂技术方法制备纳米CYSZ陶瓷热障涂层,将稀土材料与纳米材料独有的特点与热障涂层材料相结合,通过研究得到热障涂层微观组织与宏观性能之间的关系,使CeO2—Y2O3共稳定的CYSZ热障涂层很好地应用于工作温度不断提高的发动机热端部件。
2.根据权利要求1所述的热障涂层制备方法,其特征是:涂层包括高温合金基体、Ni/Al粘结层和纳米CYSZ陶瓷热障涂层,所述的高温合金基体表面连接Ni/Al粘结层,所述的Ni/Al粘结层连接纳米CYSZ陶瓷热障涂层。
3.根据权利要求1所述的热障涂层制备方法,其特征是:所述的高温合金基体表面需采用24目白刚玉砂,进行喷砂处理,使基体表面粗糙度≥4μm,再喷涂连接Ni/Al粘结层,所述的喷涂Ni/Al粘结层和所述的喷涂纳米CYSZ陶瓷热障涂层的厚度分别为100μm和200μm。
4.根据权利要求1=5之一所述的热障涂层制备方法,其特征是:所述的高温合金基体即为发动机热端组件,其材质为35Cr2Ni4MoA合金结构钢。
5.根据权利要求1-5之一所述的热障涂层制备方法,其特征是:所述的Ni/Al粘结层材料为450NS镍铝粉末(80 %Ni和20 %Al)。
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CN112176275A (zh) * | 2020-10-26 | 2021-01-05 | 中国人民解放军陆军装甲兵学院 | 一种热障涂层及其制备方法和应用 |
CN113649772A (zh) * | 2021-08-17 | 2021-11-16 | 江苏三条鱼新材料科技有限公司 | 铝合金压铸机用高温结构陶瓷/金属复合料管生产工艺 |
CN114480999A (zh) * | 2022-01-26 | 2022-05-13 | 西南科技大学 | 超高温长寿命热障涂层材料及超高温长寿命热障涂层的制备方法 |
CN117658629A (zh) * | 2023-12-01 | 2024-03-08 | 杭钢金属陶瓷(安吉)有限公司 | 一种多元复合稳定氧化锆热障涂层材料及其制备方法 |
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CN112176275A (zh) * | 2020-10-26 | 2021-01-05 | 中国人民解放军陆军装甲兵学院 | 一种热障涂层及其制备方法和应用 |
CN113649772A (zh) * | 2021-08-17 | 2021-11-16 | 江苏三条鱼新材料科技有限公司 | 铝合金压铸机用高温结构陶瓷/金属复合料管生产工艺 |
CN113649772B (zh) * | 2021-08-17 | 2022-06-24 | 江苏三条鱼新材料科技有限公司 | 铝合金压铸机用高温结构陶瓷/金属复合料管生产工艺 |
CN114480999A (zh) * | 2022-01-26 | 2022-05-13 | 西南科技大学 | 超高温长寿命热障涂层材料及超高温长寿命热障涂层的制备方法 |
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