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Non-stoichiometric gadolinium niobate ceramic coating with continuous components and preparation method thereof
The invention relates to the technical field of thermal barrier coatings, and particularly discloses a non-stoichiometric gadolinium niobate ceramic coating with continuous components and a preparation method thereof. The preparation method comprises the following steps: respectively mixing more than two kinds of Gd2O3 and Nb2O5 powder with different molar ratios x, and respectively sintering to obtain a plurality of sintered bodies; respectively crushing the multiple sintered bodies, and sieving to obtain multiple gadolinium niobate ceramic components in a non-stoichiometric ratio; respectively mixing a plurality of ceramic components into n parts of mixed ceramic powder, wherein the volume fraction of at least more than one ceramic component in the n parts of mixed ceramic powder is continuously increased or decreased; and sequentially depositing n parts of mixed ceramic powder on the base material to obtain the multi-element gradient coating with continuous components. The multi-element gradient ceramic coating obtained through the method has the high toughness of original non-stoichiometric gadolinium niobate ceramic, meanwhile, the heat conductivity detected in an experiment does not exceed 1.25 W.m<-1>.K<-1>, and the requirement of a thermal barrier coating for the low heat conductivity is met.
本发明涉及热障涂层技术领域，具体公开了一种成分连续的非化学计量比铌酸钆陶瓷涂层及其制备方法，取两种以上不同摩尔比为x的Gd2O3和Nb2O5粉末分别混合后分别进行烧结，得到多种烧结体；将多种烧结体分别粉碎后过筛得到多种非化学计量比的铌酸钆陶瓷组份；将多种陶瓷组份分别混合成n份混合陶瓷粉体，n份混合陶瓷粉体中至少一种以上的陶瓷组份的体积分数为连续递增或递减的变化；将n份混合陶瓷粉体依次沉积到基体材料上得到成分连续的多元梯度涂层。通过本专利得到的多元梯度陶瓷涂层，既具备原非化学计量比铌酸钆陶瓷的高韧性，同时通过实验检测得到热导率未超过1.25W·m‑1·K‑1，满足热障涂层对低热导率的需求。
Non-stoichiometric gadolinium niobate ceramic coating with continuous components and preparation method thereof
The invention relates to the technical field of thermal barrier coatings, and particularly discloses a non-stoichiometric gadolinium niobate ceramic coating with continuous components and a preparation method thereof. The preparation method comprises the following steps: respectively mixing more than two kinds of Gd2O3 and Nb2O5 powder with different molar ratios x, and respectively sintering to obtain a plurality of sintered bodies; respectively crushing the multiple sintered bodies, and sieving to obtain multiple gadolinium niobate ceramic components in a non-stoichiometric ratio; respectively mixing a plurality of ceramic components into n parts of mixed ceramic powder, wherein the volume fraction of at least more than one ceramic component in the n parts of mixed ceramic powder is continuously increased or decreased; and sequentially depositing n parts of mixed ceramic powder on the base material to obtain the multi-element gradient coating with continuous components. The multi-element gradient ceramic coating obtained through the method has the high toughness of original non-stoichiometric gadolinium niobate ceramic, meanwhile, the heat conductivity detected in an experiment does not exceed 1.25 W.m<-1>.K<-1>, and the requirement of a thermal barrier coating for the low heat conductivity is met.
本发明涉及热障涂层技术领域，具体公开了一种成分连续的非化学计量比铌酸钆陶瓷涂层及其制备方法，取两种以上不同摩尔比为x的Gd2O3和Nb2O5粉末分别混合后分别进行烧结，得到多种烧结体；将多种烧结体分别粉碎后过筛得到多种非化学计量比的铌酸钆陶瓷组份；将多种陶瓷组份分别混合成n份混合陶瓷粉体，n份混合陶瓷粉体中至少一种以上的陶瓷组份的体积分数为连续递增或递减的变化；将n份混合陶瓷粉体依次沉积到基体材料上得到成分连续的多元梯度涂层。通过本专利得到的多元梯度陶瓷涂层，既具备原非化学计量比铌酸钆陶瓷的高韧性，同时通过实验检测得到热导率未超过1.25W·m‑1·K‑1，满足热障涂层对低热导率的需求。
Non-stoichiometric gadolinium niobate ceramic coating with continuous components and preparation method thereof
一种成分连续的非化学计量比铌酸钆陶瓷涂层及其制备方法
FENG JING (author) / WANG YITAO (author) / YANG KAILONG (author) / CHEN LIN (author) / WANG JUN (author) / CHONG XIAOYU (author) / ZHANG ZHIDONG (author) / LI ZHENJUN (author) / WANG FENG (author)
2020-11-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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