CN114480999B - 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 - Google Patents
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 Download PDFInfo
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Abstract
本发明公开了一种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,该热障涂层材料的化学组成为Zr0.84‑xYxCe0.16O2‑0.5x,其中x=0~0.02。该热障涂层材料在室温至1600℃温度区间无相变。该热障涂层材料的断裂韧性为55~690J/m2。该热障涂层材料的制备方法包括:以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,然后采用溶胶‑喷雾热解法制备热障涂层材料;所述的超高温长寿命热障涂层是由超高温长寿命热障涂层材料通过球磨得到纳米团聚体,将该纳米团聚体经大气等离子喷涂工艺喷涂在粘结层上形成陶瓷层制备而成。本发明的材料具有更高的高温相稳定性、具有超高的断裂韧性;采用该材料制备的涂层具有更长的寿命,并且该材料制备方法简单,纯度高,便于应用。
Description
技术领域
本发明属于热障涂层领域,具体涉及一种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。
背景技术
航空燃气涡轮发动机进口温度提升100K,发动机推力提高15%;进口温度每提升200K,发动机提高一代。目前,世界上最先进的五代机典型代表F135发动机进口温度接近2000K,并呈逐步上升态势,未来六代机将达到2400K。由于当前单晶高温合金承温极限仅能达到1373K和温度提升缓慢(~4K/年),仅依靠单晶高温合金无法满足当前温度和发展需求,国际公认提高合金服役温度最有效措施是气膜冷却技术和热障涂层(TBCs)技术,这两种技术降低基体合金温度的同时也能提高其寿命,如温度降低14K,叶片寿命能提高1倍。因此,开发使用温度≥1500℃的超高温热障涂层显得尤为重要。
涂层承受温能力和抗热冲击寿命主要取决于材料的断裂韧性和高温稳定性。以经典涂层YSZ为例,其材料断裂表面能(~40J/m2),根据YSZ层与金属粘结层热膨胀系数失配计算“J Euro Ceram Soc 28(2008)1405–1419”,当YSZ层厚度150μm时,能承受1100℃热冲击而不剥落,这与目前该涂层使用情况相一致。与此相比,尽管Ln2Zr2O7(Ln=La-Yb)等涂层耐1500℃高温烧结、高温相稳定,较YSZ有明显优势,但由于其断裂韧性不足(<10J/m2)“Ceram Intern 40(2014)13979–13985”,涂层热循环寿命不足YSZ的10%“J Appl CeramTechnol 1(2004)351-61;J Am Ceram Soc 97(2014)4045–4051”。实现涂层在1500℃以上长期使用,材料的断裂表面能至少提高至80J/m2以上,即至少YSZ的2倍。目前能够达到如此高韧性的材料只有相变增韧的TZP,其断裂表面能高达300J/m2“J Euro Ceram Soc 28(2008)1405–1419”,但因RT~1000℃区间相变而不能被使用。
如能研制出如上所述的超高韧与高温无相变兼得涂层材料并制备出相应涂层,一方面可以取代现用YSZ,增大涂层厚度提高隔热效果、进一步提高进口温度增大发动机推力,也能极大延长涂层服役寿命,延长发动机寿命,减小维修成本;另一方面,对推动我国下一代发动机研制进程,缩短我国与世界航空强国差距起到积极作用。
发明内容
本发明目的在于提供一种超高温长寿命热障涂层及其制备方法,增大涂层厚度提高隔热效果、进一步提高进口温度增大发动机推力,也能极大延长涂层服役寿命。
本发明的一个目的是解决至少上述问题和/或缺陷,并提供至少后面将说明的优点。
为了实现根据本发明的这些目的和其它优点,提供了一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为Zr0.84-xYxCe0.16O2-0.5x,其中x=0~0.02。
优选的是,该热障涂层材料在室温至1600℃温度区间无相变。
优选的是,该热障涂层材料的断裂韧性为55~690J/m2。
优选的是,该热障涂层材料的制备方法包括:
以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Y(NO3)3·6H2O∶Ce(NO3)3·6H2O=(0.84-0.82)∶(0-0.2)∶0.16称量,配制金属离子总浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶,采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得粉末,即热障涂层材料。
优选的是,对热障涂层材料进行再处理,其过程为:将热障涂层材料放入低温等离子体发生装置中处理,控制装置的处理温度在45~70℃,调节氧气的流量30~55mL/min,压力为1.5~12Pa,电压在5kV~35kV之间,等离子体处理功率应控制在300~450W之间,处理时间为3~5min。
本发明还提供一种采用如上所述的超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,该超高温长寿命热障涂层是由超高温长寿命热障涂层材料通过球磨得到纳米团聚体,将该纳米团聚体经大气等离子喷涂工艺喷涂在粘结层上形成陶瓷层制备而成。
优选的是,由超高温长寿命热障涂层材料通过球磨得到纳米团聚体的过程为:将超高温长寿命热障涂层材料进行球磨、造粒和过筛,选取200-400目区间颗粒为使用的纳米团聚体。
优选的是,所述大气等离子喷涂的工艺参数为:电流500~700A、电压60~80V、氩气流量110~130SCFH、氢气流量18~22SCFH、喷涂距离8~12cm、送粉率30~40g/min、枪速280~350mm/s。
优选的是,所述粘结层的制备方法为:在基体上镀Pt后1000~1100℃处理1~3h,与基体中Ni共同形成扩散层;1050~1100℃气相渗Al 4~6h,再采用两步扩散法进行热处理,即1050~1150℃加热0.5~1.5h然后850~900℃加热12~18h;所述基体为镍基单晶高温合金N5;所述粘结层的厚度为40~60μm;所述基体在使用前表面除去氧化物和油污,然后喷砂。
优选的是,所述陶瓷层厚度为150~300μm。
本发明至少包括以下有益效果:本发明采用溶胶-喷雾热解工艺,实现了非扩散型原位低温固溶,打破了YSZ基涂层材料的“制备与相变”孪生的技术瓶颈,通过精准成分设计获得超高韧与高温无相变兼得的氧化锆热障涂层材料,该材料具有更高的高温相稳定性、具有超高的断裂韧性;采用该材料制备的涂层具有更长的寿命,并且该材料制备方法简单,纯度高,便于应用。
本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明:
图1是根据本发明的实施例经过喷雾热解和900℃热处理1h后产物的X射线衍射图谱。
图2根据本发明的实施例1600℃热处理20h后产物的X射线衍射图谱。
图3根据本发明的实施例制备块材在1600℃热处理10h后在载荷为294N的压痕SEM图像。
图4根据本发明的实施例6制备的APS粉体。
图5根据本发明的实施例6制备的16Ce1Y涂层SEM图像。
图6是所制备16Ce1Y涂层及经1200℃、1300℃、1400℃、1500℃和1600℃加热5h后产物的X射线衍射图谱。
图7是所制备16Ce1Y涂层表面宏观照片。
图8是所制备16Ce1Y涂层在1120±20℃经1000次火焰热冲击后表面宏观形貌。
图9是所制备16Ce1Y-1涂层在1120±20℃经1000次火焰热冲击后表面宏观形貌。
图10是所制备16Ce1Y涂层在1120±20℃经1000次火焰热冲击后X射线衍射图谱。
具体实施方式:
下面结合附图对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
应当理解,本文所使用的诸如“具有”、“包含”以及“包括”术语并不配出一个或多个其它元件或其组合的存在或添加。
实施例1:
一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为(Zr0.84Ce0.16)O2,(简称16Ce);
该热障涂层材料的制备方法为:以纯度为99.99%的Zr(NO3)4·3H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Ce(NO3)3·6H2O=0.84∶0.16称量,配制金属离子总能浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶;
采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得所需粉末(Zr0.84Ce0.16)O2(简称16Ce)。
实施例2:
一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为(Zr0.83Y0.01Ce0.16)O2,(简称16Ce1Y);
该热障涂层材料的制备方法为:以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Ce(NO3)3·6H2O=0.83:0.01:0.16称量,配制金属离子总能浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶;
采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得所需粉末(Zr0.83Y0.01Ce0.16)O2(简称16Ce1Y)。
实施例3:
一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为(Zr0.82Y0.02Ce0.16)O2,(简称16Ce1Y);
该热障涂层材料的制备方法为:以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Ce(NO3)3·6H2O=0.82:0.02:0.16称量,配制金属离子总能浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶;
采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得所需粉末(Zr0.82Y0.02Ce0.16)O2(简称16Ce2Y)。
实施例4:
一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为(Zr0.83Y0.01Ce0.16)O2,(简称16Ce1Y);
该热障涂层材料的制备方法为:以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Ce(NO3)3·6H2O=0.83:0.01:0.16称量,配制金属离子总能浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶;
采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得所需粉末(Zr0.83Y0.01Ce0.16)O2(简称16Ce1Y);将热障涂层材料16Ce1Y放入低温等离子体发生装置中处理,控制装置的处理温度在60℃,调节氧气的流量45mL/min,压力为5Pa,电压在15kV,等离子体处理功率应控制在350W,处理时间为3min;得到热障涂层材料,简称16Ce1Y-1。
实施例5:
一种超高温长寿命热障涂层材料,该热障涂层材料的化学组成为(Zr0.82Y0.02Ce0.16)O2,(简称16Ce2Y);
该热障涂层材料的制备方法为:以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Ce(NO3)3·6H2O=0.82:0.02:0.16称量,配制金属离子总能浓度为0.1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0.5小时得到澄清透明的溶胶;
采用纯度为99.99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得所需粉末(Zr0.82Y0.02Ce0.16)O2(简称16Ce2Y);将热障涂层材料16Ce2Y放入低温等离子体发生装置中处理,控制装置的处理温度在60℃,调节氧气的流量45mL/min,压力为5Pa,电压在15kV,等离子体处理功率应控制在350W,处理时间为3min;得到热障涂层材料,简称16Ce2Y-1。
采用荷兰帕纳科公司生产的型号为X’Pert PRO、配有X’Celerator超能探测器的多功能X射线衍射仪进行物相测试,x射线是Cu靶kα1,波长λ=0.15406nm。
XRD结果见图1,与四方t相XRD标准卡片PDF48224#对比,四方氧化锆的(111)、(002)、(200)、(004)和(400)等晶面的特征衍射峰均被检测出,表明本实施例的喷雾热解合成的Ce初始原料是纯四方氧化锆相。
高温相稳定性测试:
将上述实施例制备的粉体装入高纯氧化铝坩埚置于程控高温炉内热电偶正下方进行热处理,热处理温度1600℃,热处理时间分别为20h,升温速率3.5℃/min,以2℃/min速率降温至800℃后随炉冷却至室温;XRD结果见图2,四方氧化锆的(111)、(002)、(200)、(004)和(400)等晶面的特征衍射峰均被检测出,表明该粉体在1600℃高温热处理20h没有发生相变,仍为四方相结构。
断裂韧性测试
将上述实施例制备的粉体放入不锈钢模具(施加压力≈500兆帕)中压制直径为18mm,高度为3-4mm毫米压胚,1600℃空气/氧气中加热10h得到断裂韧性测试所需样品。在压痕测量之前,样品需抛光处理,压痕是在抛光表面上制作的,负载为9.8、49、98、294N(1、5、10、30kg)并保持10秒,每个载荷至少压制5个压痕取均值。
采用维氏(Vicker’s)压痕法对制备的材料的硬度(HV)、断裂韧性(KIC)和断裂表面能(Γ)进行检测。计算公式如下:
式中:P是载荷(N),ξ是几何因子(0.016),d是压痕尺寸(μm),c是裂纹长度(μm)。
采用扫描电子显微镜(SEM)观察样品的显微结构(FE-SEM,Ultra 55,Carl ZeissSMT Pte Ltd.,Oberkochen,Germany),测量压痕和裂纹尺寸。采用阿基米德法测试样品密度ρ,材料的理论密度ρ0是根据XRD测量的点阵常数、材料的名义化学成分以及材料晶体结构计算得到,材料的相对密度为ρ/ρ0。测试结果表明块材样品的相对密度均达99%以上,详见表1。
表1
SEM图像见图3,根据压痕图像测量的维氏压痕长度d、裂纹长度c、硬度HV、断裂韧性(KIC)和断裂表面能(Γ)见表2。
表2
样品编号 | HV(Gpa) | KIC(Mpa·m0.5) | Γ(J/m2) |
16Ce | 9.04±0.09 | 12.01±0.29 | 690±30 |
16Ce1Y | 9.66±0.08 | 4.92±0.13 | 109±6 |
16Ce2Y | 10.65±0.11 | 3.69±0.07 | 55±2 |
热障涂层材料需具有足够高的断裂韧性才能抵消热冲击过程中其与金属基体因热失配所产生的热应力。根据Evan等人的理论,应力大小可用下式描述[J Eur Ceram So28(2008)1405–1419]:
σR≈EtbcΔαtbcΔT/(1-νtbc)
式中,Etbc是涂层的杨氏模量(GPa),Δαtbc是TBC与金属粘结层或基体合金之间的热膨胀系数差(ppm/K),ΔT为热冲击温度(℃),νtbc为TBC的泊松比。热冲击弹性能Utbc为:
式中,Htbc为TBC厚度(μm)
理论计算结果表明,1100℃热冲击产生弹性能Utbc~45J/m2,与t′-4YSZ的断裂表面能J~45J/m2相一致[Proc R Soc A463(2007)1393–1408],说明4YSZ涂层完全能够承受1100℃热冲击而不开裂、甚至剥落;当1500℃热冲击温度时,其要求TBC材料至少在100J/m2。16Ce和16Ce1Y样品断裂韧性均超过100J/m2,表明这种材料可以实现1500℃以上超高温使用。
实施例6:
一种采用如上所述的超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,该涂层是由Zr0.84-xYxCe0.16O2-0.5x(x=0~0.02)纳米团聚体经大气等离子喷涂工艺喷涂在粘结层上形成陶瓷层制备而成;所述Zr0.84-xYxCe0.16O2-0.5x(x=0~0.02)纳米团聚体是由全稳定四方Zr0.84-xYxCe0.16O2-0.5x(x=0~0.02)粉末通过球磨造粒制备得到;采用美国普莱克斯(Praxair 7700)大气等离子喷涂仪,制备厚度约为200μm的陶瓷层,其喷涂工艺参数如表3所示,
所述粘结层是用CVD方法制备得到50μm厚度单相(Ni,Pt)Al,基体为第二代单晶高温合金N5组成。其中单晶高温合金N5的元素组成如表4所示,基体使用前表面除去氧化物和油污,然后喷砂。所述粘结层的制备方法为:在基体上镀Pt后1050℃处理2h,与基体中Ni共同形成扩散层;1080℃气相渗Al 5h,再采用两步扩散法进行热处理,即1100℃加热1h然后875℃加热16h。
APS用16C1YSZ粉料经球磨、造粒、过筛,选取200-400目区间颗粒为APS粉料,经造粒和筛分的粉料呈球形,较均匀(图4)。选取(111)晶面根据谢乐公式:D=0.89λ/βcosθ计算,沉积态的晶粒尺寸~50nm(图6)。
表3
表4
Ni | Cr | Co | W | Mo | Ta | Al | Re | C | Y | Hf | Si |
Bal. | 7 | 7.5 | 5 | 1.5 | 6.5 | 6.2 | 3 | 0.05 | 0.01 | - | - |
经大气等离子喷涂制备得到16Ce1Y热障涂层宏观形貌如图7所示。表面呈现均匀淡黄色,颜色分布均匀,说明16Ce1Y中Ce元素的分布均匀。涂层显微结构见图5,APS制备涂层中有大量微米级柱状晶,并呈现交错排列。
高温相稳定性:
16C1YSZ涂层(16Ce1Y热障涂层)经1200~1600℃温度区间热处理,在XRD图谱(图6)中均未见有新的衍射峰出现,依然保持纯t相;高角度选区衍射的t相(004)和(400)晶面衍射峰之间未见有其它衍射峰,这进一步表明该涂层即使在1600℃热处理后依然是纯t相。文献已报道的APS涂层在1473K煅烧100~400小时后,已有11mol%的m相(Adv inCeram1981(3)241~253;J Therm Spray Technol 2001,10(3)497-501),电子束物理气相沉积制备的YSZ涂层,在1473K煅烧200小时后,有3mol%的m相(J Am Ceram Soc 2000,83(4)904-910)。这表明,本发明所制备的YSZ涂层(16Ce1Y热障涂层)高温相稳定性更好,可将涂层的服役温度从1100℃提高到1600℃乃至更高,有利于进一步提升高温热端部件防护涂层的使用温度。
火焰热冲击试验:
火焰热冲击试验采用“30s加热+30s冷却”的热循环组合,用系统自带照相机实时拍摄火焰热冲击测试后的涂层表面状态,拍摄周期为15s。在进行火焰热冲击测试过程中采用红外测温记录仪进行热冲击过程陶瓷层表面温度的实时测试,火焰热冲击过程中陶瓷层表面最高温度于30s内可达1120±20℃。
经历1000次火焰热冲击后试样(16Ce1Y热障涂层)表面宏观形貌如图8所示。试样表面仅有微弱“黑点”,整体表面仍呈现淡黄色,未见剥落和开裂;经历1000次火焰热冲击后试样(16Ce1Y-1热障涂层)表面宏观形貌如图9所示。试样表面几乎无微弱“黑点”,整体表面仍呈现淡黄色,未见剥落和开裂。XRD结果显示16Ce1Y经历1000次火焰热冲击之后,未见m相,依然是t相(图10)。表明这种超高温涂层材料已具有长寿命。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的图例。
Claims (9)
1.一种超高温长寿命热障涂层材料,其特征在于,该热障涂层材料的化学组成为(Zr0.83Y0.01Ce0.16)O2;
该热障涂层材料的制备方法包括:
以纯度为99.99%的Zr(NO3)4·3H2O、Y(NO3)3·6H2O、Ce(NO3)3·6H2O为原料,按摩尔比Zr(NO3)4·3H2O∶Y(NO3)3·6H2O∶Ce(NO3)3·6H2O=(0.84-0.82)∶(0-0.2)∶0.16称量,配制金属离子总浓度为0 .1mol/L的水溶液,加入添加剂柠檬酸、聚乙二醇,其添加量分别为50克/升、30克/升,磁力搅拌0 .5小时得到澄清透明的溶胶,采用纯度为99 .99%、压力为0.1MPa的空气为雾化介质,将溶胶雾化到温度为400℃的刚玉坩埚内快速去除水分,得到所述超高温长寿命热障涂层材料前驱体,在900℃空气气氛中煅烧1小时后冷却至室温,获得粉末,即热障涂层材料。
2.如权利要求1所述的超高温长寿命热障涂层材料,其特征在于,该热障涂层材料在室温至1600℃温度区间无相变。
3.如权利要求1所述的超高温长寿命热障涂层材料,其特征在于,该热障涂层材料的断裂表面能为55~690 J/m2。
4.如权利要求1所述的超高温长寿命热障涂层材料,其特征在于,对热障涂层材料进行再处理,其过程为:将热障涂层材料放入低温等离子体发生装置中处理,控制装置的处理温度在45~70℃,调节氧气的流量30~55 mL/ min,压力为1.5~12Pa,电压在5kV~35kV之间,等离子体处理功率应控制在300~450W之间,处理时间为3~5min。
5.一种采用如权利要求1~4任一项所述的超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,该超高温长寿命热障涂层是由超高温长寿命热障涂层材料通过球磨得到纳米团聚体,将该纳米团聚体经大气等离子喷涂工艺喷涂在粘结层上形成陶瓷层制备而成。
6.如权利要求5所述的采用超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,由超高温长寿命热障涂层材料通过球磨得到纳米团聚体的过程为:将超高温长寿命热障涂层材料进行球磨、造粒和过筛,选取200-400目区间颗粒为使用的纳米团聚体。
7.如权利要求5所述的采用超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,所述大气等离子喷涂的工艺参数为:电流500~700A、电压60~80V、氩气流量110~130 SCFH、氢气流量18~22 SCFH、喷涂距离8~12cm、送粉率30~40g/min、枪速280~350mm/s。
8.如权利要求5所述的采用超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,所述粘结层的制备方法为:在基体上镀Pt后1000~1100℃处理1~3h,与基体中Ni共同形成扩散层;1050~1100℃气相渗Al 4~6h,再采用两步扩散法进行热处理,即1050~1150℃加热0.5~1.5h然后850~900℃加热12~18h;所述基体为镍基单晶高温合金N5;所述粘结层的厚度为40~60μm;所述基体在使用前表面除去氧化物和油污,然后喷砂。
9.如权利要求5所述的采用超高温长寿命热障涂层材料制备超高温长寿命热障涂层的方法,其特征在于,所述陶瓷层厚度为150~300μm。
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