Fabrication of TiB2 Dispersed Fe-Cr Composite Coatings by Low Pressure Plasma Spray and Evaluation of Its Property

Original equiaxed 316L stainless steel coatings were successfully deposited by the low pressure plasma spray. For comparison, the coatings of 316L stainless steel with normal lamellar structure were also prepared by the air plasma spray (APS). The microstructures were investigated using optical micrograph (OM). The results show that the microstructures of LPPS 316L stainless steel coatings reveal the fine equiaxed microstructures like the solidified stainless steels,which are significantly different from that of APS coatings with lamellar structures.

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Ablation Behavior of Low Pressure Plasma Sprayed TiB2-MoSi2 Composite Coatings

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.697.685 ◽

2016 ◽

Vol 697 ◽

pp. 685-688

Author(s):

Li Ping Huang ◽

Ya Ran Niu ◽

Hong Li ◽

Mu Su Ren ◽

Xue Bin Zheng ◽

...

Keyword(s):

Phase Composition ◽

Composite Coatings ◽

Great Influence ◽

Low Pressure ◽

Plasma Flame ◽

Pressure Plasma ◽

Ablation Resistance ◽

Low Pressure Plasma Spray ◽

Low Pressure Plasma ◽

Plasma Sprayed

In this work, TiB2-MoSi2 composite coatings with various contents of MoSi2 (20 vol. % and 40 vol. %, respectively) were fabricated on SiC coated C/C substrates by low pressure plasma spray (LPPS) technique. The microstructure and phase composition of the coatings were characterized. The ablation behaviors of the composite coatings were evaluated and compared with the pure TiB2 coating using a plasma flame of about 2200°C. The results showed that MoSi2 was uniformly distributed in the TiB2 matrix. All the coatings kept intact after the ablation for 60s - 180s, indicating their excellent ablation resistance. The addition of MoSi2 had great influence on the ablation behavior of the composite coatings. The TiB2 coating gained mass after the ablation. The mass of the TM20 coating increased firstly (60s and 120s) and then decreased at 180 s. Mass loss was observed for the TM40 coating during the whole procedure of ablation test.

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Oxidation Behavior of SiC Reinforced ZrB2 Composite Coating Prepared by Low Pressure Plasma Spray

Ceramic Transactions Series - High Temperature Ceramic Matrix Composites 8 ◽

10.1002/9781118932995.ch53 ◽

2014 ◽

pp. 481-486

Author(s):

Cui Hu ◽

Yaran Niu ◽

Hong Li ◽

Xuebin Zheng ◽

Chuanxian Ding ◽

...

Keyword(s):

Composite Coating ◽

Plasma Spray ◽

Oxidation Behavior ◽

Low Pressure ◽

Pressure Plasma ◽

Low Pressure Plasma Spray ◽

Low Pressure Plasma

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Application of low-pressure plasma-spray coatings.

Journal of the Metal Finishing Society of Japan ◽

10.4139/sfj1950.39.382 ◽

1988 ◽

Vol 39 (7) ◽

pp. 382-387

Author(s):

Yoshitaka KOJIMA ◽

Hiroshi FUKUI ◽

Naotatsu ASAHI

Keyword(s):

Plasma Spray ◽

Low Pressure ◽

Spray Coatings ◽

Pressure Plasma ◽

Plasma Spray Coatings ◽

Low Pressure Plasma Spray ◽

Low Pressure Plasma

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Fabrication of Dense Gadolinia-Doped Ceria Coatings via Very-Low-Pressure Plasma Spray and Plasma Spray–Physical Vapor Deposition Process

Coatings ◽

10.3390/coatings9110717 ◽

2019 ◽

Vol 9 (11) ◽

pp. 717 ◽

Cited By ~ 1

Author(s):

Jing Wen ◽

Chen Song ◽

Taikai Liu ◽

Ziqian Deng ◽

Shaopeng Niu ◽

...

Keyword(s):

Mechanical Properties ◽

Plasma Spray ◽

Vapor Deposition ◽

Physical Vapor Deposition ◽

Low Pressure ◽

Doped Ceria ◽

Large Area ◽

Pressure Plasma ◽

Low Pressure Plasma Spray ◽

Low Pressure Plasma

Gadolinia-doped ceria (GDC) is a promising electrolyte material for low-temperature solid oxide fuel cells (LT-SOFCs). Many works used ceramic sintering methods to prepare the GDC electrolyte, which was mature and reliable but presented difficulties in rapidly preparing a large area of GDC electrolyte without cracks. The low-pressure plasma spray (LPPS) process has the potential to solve this problem, but few studies have been conducted to date. In this work, submicron GDC powder was agglomerated by a spray drying method to achieve the proper granularity with D50 about 10 μm, and then two dense GDC coatings were fabricated with this agglomerated GDC powder using very-low-pressure plasma spray (VLPPS) and plasma spray–physical vapor deposition (PS-PVD), respectively. The results indicate that the two GDC coatings exhibited similar microstructure but with different densification mechanisms. The VLPPS coating was mainly built up in the form of liquid splats, which had lower mechanical properties due to the lower density and crystallinity, while the PS-PVD coating was co-deposited with the vapor clusters and liquid splats, which had higher density, crystallinity, and mechanical properties. It can therefore be concluded that the GDC coating prepared by PS-PVD is more appropriate for the LT-SOFC application.

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