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大气等离子喷涂制备的AlO-ZrO-ReB复合涂层的微观结构与化学稳定性

Microstructure and Chemical Stability of AlO-ZrO-ReB Composite Coatings Obtained by Air Plasma Spraying.

作者信息

Wrona Adriana, Czechowska Kinga, Bilewska Katarzyna, Czerny Monika, Czech Anna, Lis Marcin, Brudny Anna, Muzia Grzegorz, Jaworska Lucyna

机构信息

Łukasiewicz Research Network-Institute of Non-Ferrous Metals, Sowinskiego 5 St., 44-100 Gliwice, Poland.

Department of Physical Metallurgy and Powder Metallurgy, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, Mickiewicza 30 Av., 30-059 Krakow, Poland.

出版信息

Materials (Basel). 2025 Jul 17;18(14):3363. doi: 10.3390/ma18143363.

DOI:10.3390/ma18143363
PMID:40731573
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12298890/
Abstract

This study investigated the effect of adding superhard ReB to atmospheric plasma sprayed (APS) coatings based on 60 wt% AlO and 40 wt% ZrO. The amorphous phases commonly present in such coatings are known to impair their performance. ReB was introduced as a crystallization nucleus due to its high melting point. ReB decomposes in the presence of moisture and oxygen into HBO, ReO, HBO, and HReO. ReB was encapsulated with AlO via metallothermic synthesis to improve moisture stability, yielding a powder with d = 15.1 μm. After milling, it was added at 20 wt% to the AlO-ZrO feedstock. Agglomeration parameters were optimized, and coatings were deposited under varying APS conditions onto 316L steel substrates with a NiAl bond coat. In the coating with the highest ReB content, the identified phases included ReB (2.6 wt%), Re (0.8 wt%), α-AlO (30.9 wt%), η-AlO (32.4 wt%), and monoclinic and tetragonal ZrO. The nanohardness of the coating, measured using a Vickers indenter at 96 mN and calculated via the Oliver-Pharr method, was 9.2 ± 1.0 GPa. High abrasion resistance was obtained for the coating with a higher content of η-AlO (48.7 wt%). The coefficient of friction, determined using a ball-on-disc test with a corundum ball, was 0.798 ± 0.03. After 15 months, the formation of (HO)(ReO) was observed, suggesting initial moisture-induced changes. The results confirm that AlO-encapsulated ReB can enhance phase stability and crystallinity in APS coatings.

摘要

本研究调查了在基于60 wt% AlO和40 wt% ZrO的大气等离子喷涂（APS）涂层中添加超硬ReB的效果。已知此类涂层中常见的非晶相会损害其性能。由于ReB熔点高，将其作为结晶核引入。ReB在水分和氧气存在下分解为HBO、ReO、HBO和HReO。通过金属热合成用AlO封装ReB以提高水分稳定性，得到粒径d = 15.1 μm的粉末。研磨后，以20 wt%的比例添加到AlO-ZrO原料中。优化团聚参数，并在不同的APS条件下将涂层沉积到带有NiAl粘结层的316L钢基底上。在ReB含量最高的涂层中，鉴定出的相包括ReB（2.6 wt%）、Re（0.8 wt%）、α-AlO（30.9 wt%）、η-AlO（32.4 wt%）以及单斜相和四方相ZrO。使用维氏压头在96 mN下测量并通过奥利弗-法尔方法计算得到的涂层纳米硬度为9.2±1.0 GPa。对于η-AlO含量较高（48.7 wt%）的涂层，获得了高耐磨性。使用刚玉球进行球盘试验测定的摩擦系数为0.798±0.03。15个月后，观察到(HO)(ReO)的形成，表明初始的水分诱导变化。结果证实，AlO封装的ReB可增强APS涂层中的相稳定性和结晶度。

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