CN114058999A - 一种抑制基体/热障涂层粘结层元素互扩散的热障涂层 - Google Patents
一种抑制基体/热障涂层粘结层元素互扩散的热障涂层 Download PDFInfo
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Abstract
本发明公开了一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,包括由内至外依次设置在基体上的MCrAlY金属粘结层和ZrO2‑6~8Y2O3陶瓷层,M=Ni或Co或Ni+Co;所述的金属粘结层由底部粘结层和顶部粘结层组成,底部粘结层的组分与基体组分完全相同,元素无浓度梯度;顶部粘结层为的MCrAlY,Al、Cr元素含量相对基体高。本发明的热障涂层有效避免了传统涂层中粘结层/基体元素互扩散的发生,且生产工艺简单、效率高、性能优异且稳定,适合规模化应用于航空发动机、燃气轮机的热端部件。
Description
技术领域
本发明涉及热障涂层技术领域,尤其是涉及一种抑制基体/热障涂层粘结层元素互扩散的热障涂层。
背景技术
热障涂层是提高先进航空发动机、燃气轮机热端部件使用温度最有效的手段,是先进燃气轮机不可或缺的关键技术之一。典型的热障涂层由6%~8%Y2O3部分稳定ZrO2陶瓷顶层(6~8YSZ)、MCrAlY(M=Ni或Co或Ni+Co)或改性的铝化物粘结层组成。热障涂层在高温服役过程中,由于基体与粘结层成分、各元素含量的不同,界面将发生元素互扩散行为:Al元素由粘结层向基体内扩散,Ni、Cr、W、Ta、Hf等由基体向粘结层外扩散;高于1000℃时互扩散速率显著增加,使涂层发生退化,影响基体性能,降低热障涂层体系寿命。
发明内容
本发明的目的在于提供一种抑制基体/热障涂层粘结层元素互扩散的热障涂层。通过设置两层粘结层,底部粘结层与基体材料组分相同,元素基本没有浓度梯度形成,抑制了基体与热障涂层粘结层间的元素互扩散,不影响基体性能;顶部粘结层的Cr、Al等化学元素含量相对较高,提高热障涂层体系的抗高温氧化性能,保证了热障涂层体系寿命。
本发明采用如下技术方案来实现的:
一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,包括由内至外依次设置在基体上的MCrAlY金属粘结层和ZrO2-6~8Y2O3陶瓷层,M=Ni或Co或Ni+Co;所述的金属粘结层由底部粘结层和顶部粘结层组成,底部粘结层的组分与基体组分完全相同,元素无浓度梯度;顶部粘结层为的MCrAlY,Al、Cr元素含量相对基体高。
本发明进一步的改进在于,底部粘结层厚度为50~100μm,顶部粘结层厚度为100~200μm。
本发明进一步的改进在于,ZrO2-6~8Y2O3陶瓷层厚度为300~600μm。
本发明进一步的改进在于,底部粘结层采用超音速火焰喷涂制备而成,与基体的结合强度控制在70MPa以上;顶部粘结层采用大气等离子喷涂制备而成。
本发明进一步的改进在于,所述的底部粘结层的超音速火焰喷涂工艺参数为:空气压力为0.5~1.2MPa,燃料压力为0.6~1.5MPa,送粉气体压力为0.8~1.5MPa,送粉速度为30~80g/min,喷涂距离为200~400mm,喷枪移动速度为80~200mm/s,燃料为丙烷和氧气,送粉气体为N2。
本发明进一步的改进在于,所述的顶部粘结层的大气等离子喷涂工艺参数为:电压为70~100V,电流为400~600A,主气和副气压力为0.4~1.2MPa,送粉气体流量为10~50L/min,喷涂距离为100~200mm,喷枪行走速度为200~500mm/s,送粉气体为N2。
本发明进一步的改进在于,ZrO2-6~8Y2O3陶瓷层采用大气等离子喷涂方法制备而成,与粘结面层的结合强度控制在20MPa~300MPa。
本发明进一步的改进在于,所述的ZrO2-6~8Y2O3陶瓷层的大气等离子喷涂工艺参数为:电压为50~100V,电流为400~600A,主气和副气压力为0.4~0.8MPa,送粉气体流量为4~8L/min,喷涂距离为100~150mm,行走速度为20~50mm/s,送粉气体为N2。
本发明至少具有如下有益的技术效果:
本发明提供的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层。通过设置两层粘结层,底部粘结层与基体材料组分相同,元素基本没有浓度梯度形成,抑制高温部件基体与热障涂层粘结层间的元素互扩散,不影响基体性能;顶部粘结层的Cr、Al等化学元素含量相对较高,提高热障涂层体系的抗高温氧化性能,保证了热障涂层体系寿命。本发明的热障涂层生产工艺简单、效率高、性能优异且稳定,适合规模化应用于航空发动机、燃气轮机的热端部件。
附图说明
图1为一种抑制基体/热障涂层粘结层元素互扩散的热障涂层结构。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例,然而应当理解,可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反,提供这些实施例是为了能够更透彻地理解本公开,并且能够将本公开的范围完整的传达给本领域的技术人员。需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
如图1所示,本发明提供的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,包括由内至外依次设置在基体1上的MCrAlY金属粘结层和ZrO2-6~8Y2O3陶瓷层4,M=Ni或Co或Ni+Co;所述的金属粘结层由底部粘结层2和顶部粘结层3组成,底部粘结层2的组分与基体组分完全相同,元素无浓度梯度;顶部粘结层3为的MCrAlY,Al、Cr元素含量相对基体高。
底部粘结层2厚度为50~100μm,顶部粘结层3厚度为100~200μm。ZrO2-6~8Y2O3陶瓷层4厚度为300~600μm。
底部粘结层采用超音速火焰喷涂制备而成,与基体的结合强度控制在70MPa以上;顶部粘结层采用大气等离子喷涂制备而成。ZrO2-6~8Y2O3陶瓷层采用大气等离子喷涂方法制备而成,与粘结面层的结合强度控制在20MPa~300MPa。
所述的底部粘结层的超音速火焰喷涂工艺参数为:空气压力为0.5~1.2MPa,燃料压力为0.6~1.5MPa,送粉气体压力为0.8~1.5MPa,送粉速度为30~80g/min,喷涂距离为200~400mm,喷枪移动速度为80~200mm/s,燃料为丙烷和氧气,送粉气体为N2。
所述的顶部粘结层的大气等离子喷涂工艺参数为:电压为70~100V,电流为400~600A,主气和副气压力为0.4~1.2MPa,送粉气体流量为10~50L/min,喷涂距离为100~200mm,喷枪行走速度为200~500mm/s,送粉气体为N2。
所述的ZrO2-6~8Y2O3陶瓷层的大气等离子喷涂工艺参数为:电压为50~100V,电流为400~600A,主气和副气压力为0.4~0.8MPa,送粉气体流量为4~8L/min,喷涂距离为100~150mm,行走速度为20~50mm/s,送粉气体为N2。
实施例
本实施例中两种热障涂层的基体合金均采用DZ411镍基高温合金,试样尺寸为30mm×10mm×1.5mm。其中热障涂层1为本发明设计的热障涂层体系,采用ZrO2 8Y2O3(Metco204NS)陶瓷粉末作为陶瓷层的原始材料,采用Ni23Co17Cr12Al0.5Y(Amdry 365-1)镍基高温合金粉末作为顶部粘结层的原始材料,底部粘结层的原始材料中Co:9.00~10.0wt.%、Al:2.8~3.4wt.%、Cr:13.5~14.3wt.%、Y:0.5wt.%、Ni为余量。热障涂层2为传统热障涂层体系(只有一层粘结层),采用ZrO2 8Y2O3(Metco 204NS)陶瓷粉末作为陶瓷层的原始材料,采用Ni23Co17Cr12Al0.5Y(Amdry 365-1)镍基高温合金粉末作为粘结层的原始材料。实施例1中热障涂层1的厚度、制备工艺参数见表1,热障涂层2与热障涂层1的区别仅为无粘结底层。
表1实施例1中热障涂层1的厚度及制备工艺参数
经测试,实施例1制备的热障涂层1粘结层与基体的结合强度70MPa以上(胶断),粘结层与陶瓷层的结合强度为24MPa;热障涂层2粘结层与基体的结合强度为70MPa以上(胶断),粘结层与陶瓷层的结合强度为25MPa。两种热障涂层的结合强度性能相当。
将实施例1中的两种热障涂层分别放入马弗炉中,马弗炉温度设定为1100℃,保温50小时。基体与粘结层界面组织分析发现,热障涂层1基本无粘结层/基体元素互扩散的发生。
虽然,上文中已经用一般性说明及具体实施方案对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。
Claims (8)
1.一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,包括由内至外依次设置在基体上的MCrAlY金属粘结层和ZrO2-6~8Y2O3陶瓷层,M=Ni或Co或Ni+Co;所述的金属粘结层由底部粘结层和顶部粘结层组成,底部粘结层的组分与基体组分完全相同,元素无浓度梯度;顶部粘结层为的MCrAlY,Al、Cr元素含量相对基体高。
2.根据权利要求1所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,底部粘结层厚度为50~100μm,顶部粘结层厚度为100~200μm。
3.根据权利要求1所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,ZrO2-6~8Y2O3陶瓷层厚度为300~600μm。
4.根据权利要求1所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,底部粘结层采用超音速火焰喷涂制备而成,与基体的结合强度控制在70MPa以上;顶部粘结层采用大气等离子喷涂制备而成。
5.根据权利要求4所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,所述的底部粘结层的超音速火焰喷涂工艺参数为:空气压力为0.5~1.2MPa,燃料压力为0.6~1.5MPa,送粉气体压力为0.8~1.5MPa,送粉速度为30~80g/min,喷涂距离为200~400mm,喷枪移动速度为80~200mm/s,燃料为丙烷和氧气,送粉气体为N2。
6.根据权利要求4所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,所述的顶部粘结层的大气等离子喷涂工艺参数为:电压为70~100V,电流为400~600A,主气和副气压力为0.4~1.2MPa,送粉气体流量为10~50L/min,喷涂距离为100~200mm,喷枪行走速度为200~500mm/s,送粉气体为N2。
7.根据权利要求1所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,ZrO2-6~8Y2O3陶瓷层采用大气等离子喷涂方法制备而成,与粘结面层的结合强度控制在20MPa~300MPa。
8.根据权利要求7所述的一种抑制基体/热障涂层粘结层元素互扩散的热障涂层,其特征在于,所述的ZrO2-6~8Y2O3陶瓷层的大气等离子喷涂工艺参数为:电压为50~100V,电流为400~600A,主气和副气压力为0.4~0.8MPa,送粉气体流量为4~8L/min,喷涂距离为100~150mm,行走速度为20~50mm/s,送粉气体为N2。
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