Thermal Spray Using a High-Frequency Pulse Detonation Combustor Operated in the Liquid-Purge Mode

Endo, Tamio; Obayashi, R.; Tajiri, Takayuki; Kimura, Kaname; Morohashi, Yuko; Johzaki, Tomoyuki; Matsuoka, K.; Hanafusa, Teruhisa; Mizunari, S.

doi:10.1007/s11666-015-0354-8

Cited by 20 publications

(5 citation statements)

References 39 publications

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“…The multi-chamber detonation device and cumulative technology are widely used in industry to obtain dense coatings with high adhesive and cohesive properties [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. This technology has a huge potential for the production of metal–ceramic composite targets from a mixture of micro-powders due to the following advantages: the ability to spray almost any powder compositions, high deposition efficiency of the coating up to 90%, the possibility of spraying large areas at a relatively low cost of the process, differentiation in thickness and size of the coating.…”

Section: Methodsmentioning

confidence: 99%

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

et al. 2022

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A metal–ceramic composite target for magnetron sputtering was fabricated for the first time by a robotic complex for the detonation spraying of coatings equipped with a multi-chamber detonation accelerator. A mixture of metal and ceramic NiCr/B4C powders was sprayed onto the copper base of the cylindrical composite target cathode. The study of the structure of a metal–ceramic composite coating target using scanning electron microscopy showed that the coating material is dense without visible pores; the elemental composition is evenly distributed in the material. The study of the cathode sputtering area after deposition in the DC mode showed that there are uniform traces of annular erosion on the target surface. The obtained cathode target with an NiCr-70B4C coating was used to deposit the NiB-Cr7C3 coating on flat specimens of 65G steel using equipment for magnetron sputtering UNICOAT 200. The coating was applied in the Direct Current mode. A dense NiB-Cr7C3 coating with a thickness of 2 μm was obtained. The NiB-Cr7C3 coating has a quasi-amorphous structure. The microstructures and concentration of oxygen and carbon impurities throughout the entire thickness of the coating were investigated by means of transmission electron microscopy. The results of the study show that the coatings have a nanocrystalline multi-phase structure. The microhardness of the NiB-Cr7C3 coating reached 10 GPa, and the adhesion fracture load exceeded 16 N. The results will open up new prospects for the further elaboration of technology for obtaining original composite cathodes for magnetron sputtering using detonation spraying of coatings.

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Section: Methodsmentioning

confidence: 99%

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

et al. 2022

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“…The detonation is initiated in the RDE combustion channel during period (3). The hot fire combustion test begins during period (3) and continues through periods (4), (5), and (6). A steady state is obtained at the beginning of period (5) at the main combustor channel.…”

Section: Methodsmentioning

confidence: 99%

“…In 2011, General Electric conducted a performance test of a gas turbine system based on a pulse detonation combustor [4]. Currently, given the physical and performance limitations of low-frequency pulsed operations, PDEs are used in applied areas or propulsion subsystems such as thermal sprays [5], reaction control systems [6,7] and combustion wave igniters [8,9], rather than as the main propulsion systems. However, they continue to be used for the study of detonation physics.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Detonation Propagation Modes and Thrust Performance in a Small Rotating Detonation Engine Using C2H4/O2 Propellant

2021

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A small rotating detonation engine (RDE) model and the corresponding experimental setup were constructed for the experimental investigation of the detonation propagation characteristics and thrust performance of a circular RDE. Experiments were conducted at a range of 0.3–2.5 equivalence ratio with a total mass flow rate of less than 180.0 g/s using a C2H4/O2 mixture. Irregularly unstable detonative combustion occurs immediately after the detonation initiation, which includes initiation, propagation, decaying, and the merging of detonation waves. Following this, periodically unsteady detonative combustion occurs in the circular channel, resulting in the stable operation of the RDE. During stable operation, two detonation waves are predominant, rotating along the wall at a speed lower than the Chapman–Jouguet (CJ) detonation speed. The characteristic velocity efficiency is approximately 73% on average. The low characteristic velocity efficiency is presumed to be caused by the unoptimized combustion channel and the poor mixing efficiency owing to the two-dimensional injector configuration. The effect of the RDE component design and the RDE flow field characteristics need to be further investigated for improving the performance of the RDE.

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“…Multi-chamber detonation device and cumulative technology are widely used in industry to obtain dense coatings with high adhesion and cohesive properties [8][9][10][11]. This technology has great potential for metal ceramic composite targets made from a mixture of micro-powders due to the following advantages: ability to spray almost any powder compositions, high deposition efficiency of the coating up to 90%, ability to spray large areas at a relatively low cost of the process, differentiation by coating thickness and size.…”

Section: Introductionmentioning

confidence: 99%

Detonation Spraying of Composite Targets Based on Ni, Cr and B<sub>4</sub>C for Magnetron Multi-Functional Coating

Сирота

Zaı̆tsev

Прохоренков

et al. 2022

KEM

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The paper presents a method of producing a ceramic metal composite target by detonation gas-thermal spraying allowing spraying almost any powder compositions with high deposition efficiency of up to 90% and the possibility of spraying large areas at a relatively low cost, differentiation by coating thickness and size. The efficiency of detonation technology and related devices for the production of original composite cathodes for magnetron sputtering using the example of the powder composition Ni + Cr + B4C is justified. These materials make it possible to obtain composite coatings with a unique composition and characteristics using a magnetron. Magnetron sputtering is one of the most suitable methods for the industry. The influence of the process mode of metal ceramic powder application on copper substrate is considered. The structure of a metal-ceramic composite target was studied by scanning electron microscopy. It was shown that the target surface is dense without visible pores. The elemental composition of the powder is uniformly distributed over the target surface.

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Thermal Spray Using a High-Frequency Pulse Detonation Combustor Operated in the Liquid-Purge Mode

Cited by 20 publications

References 39 publications

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

NiB-CrC Coatings Prepared by Magnetron Sputtering Using Composite Ceramic NiCr-BC Target Produced by Detonation Spray Coating

Experimental Investigation of Detonation Propagation Modes and Thrust Performance in a Small Rotating Detonation Engine Using C2H4/O2 Propellant

Detonation Spraying of Composite Targets Based on Ni, Cr and B<sub>4</sub>C for Magnetron Multi-Functional Coating

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