The erosion-oxidation behavior of HVOF Cr3C2-NiCr cermet coating
The erosion-oxidation behavior of HVOF Cr3C2-NiCr cermet coating
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DOI：
10.1016/0043-1648(94)90100-7
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发表时间：
1994-05
期刊：
影响因子：
5
通讯作者：
B. Wang;K. Luer
中科院分区：
文献类型：
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作者：
B. Wang;K. Luer
DenSys DS-200涂层是一种专有的超音速氧气燃料（HVOF）Cr 3C 2-NiCr金属陶瓷涂层，用于高温服务环境，包括流化床锅炉、燃煤锅炉和城市垃圾焚烧炉。采用不同的试验温度、冲击角度、冲蚀量和颗粒速度对该涂层的高温冲蚀腐蚀（氧化）行为进行了研究。比较了Cr 3C 2-NiCr涂层与1018钢、FeCrSiB（Armacor M）、Ni基、Cr2 O3 - 6SiO 2 - 4Al 2 O3（Rokide C）、Cr2 O3 - 12 SiO2 - 2Al 2 O3 - 4 MgO（Rokide MBC）和WC-NiCrCo（SMI 712）等热喷涂涂层的冲蚀腐蚀行为。结果表明，在30°和90°冲击角下，Cr 3C 2-NiCr涂层的抗冲蚀氧化性能优于1018钢和其它涂层。涂层的冲蚀氧化行为与其形貌密切相关。HVOF Cr 3C 2-NiCr涂层的高抗冲蚀-氧化性能归因于其低孔隙率、细晶粒结构和均匀分布的硬质碳化物/氧化物，这些硬质碳化物/氧化物在韧性和耐腐蚀的金属粘结剂内形成骨架网络。
DenSys DS-200 coating is a proprietary hypersonic velocity oxygen fuel (HVOF) Cr3C2-NiCr cermet coating used in elevated temperature service environments including fluidized bed boilers, coal-fired boilers and municipal waste incinerators. The elevated temperature erosion-corrosion (oxidation) behavior of this HVOF Cr3C2-NiCr coating was investigated using a range of test temperatures, impact angles, erodents and particle velocities. The erosion-corrosion behavior of HVOF Cr3C2-NiCr coatings was compared with those of 1018 steel and other thermal-spray coatings including FeCrSiB (Armacor M), Ni-base, Cr2O3-6SiO2-4Al2O3(Rokide C), Cr2O3-12SiO2-2Al2O3-4MgO (Rokide MBC) and WC-NiCrCo (SMI 712). It was found that the erosion-oxidation resistance of HVOF Cr3C2-NiCr coating was higher than those of 1018 steel and other coatings at impact angles of 30° and 90°. The erosion-oxidation behavior of coatings was well related to their morphology. The high erosion-oxidation resistance of the HVOF Cr3C2-NiCr coating was attributed to its low porosity, fine grain structure and homogeneous distribution of hard carbides/oxides which form a skeletal network within a ductile and corrosion-resistant metal binder.