Cermet composite coating with a ductile Ni3Al binder phase and an in-situ Cr7C3 augmented phase

Published on Nov 1, 2021in Intermetallics3.398
· DOI :10.1016/J.INTERMET.2021.107300
#1Jing Wu (TJU: Tianjin University)H-Index: 9
#2Chong Li (TJU: Tianjin University)H-Index: 22
Last. Haipeng Wang (NPU: Northwestern Polytechnical University)H-Index: 5
view all 7 authors...
Abstract In present work, a multiphase Ni 3 Al-based intermetallic alloy with complex components of γ'+γ dendrite comprising extremely high volume fraction (81 vol %) of γ′ phase and interdendritic β phase is investigated, the microstructure evolution and phase transformation behavior tailored by different solution cooling rates are studied by applying different cooling methods of water cooling (WC, 138 °C/s), air cooling (AC, 72 °C/s), and furnace cooling (FC, 0.05 °C/s) after solution treatmen...
16 CitationsSource
#1Hong-Bin ZhuH-Index: 1
#2Jie ShenH-Index: 2
Last. Changhai LiH-Index: 2
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This work is aimed at developing a new type of Cr7C3-(Ni,Cr)3(Al,Cr) coating for parts used in heavy-duty diesel engines. The feedstock, in which the stripe-shaped Cr7C3 was in situ formed, was firstly prepared by vacuum melting and gas atomization and then subjected by high-velocity oxy-fuel spraying to form the coatings. The carbon content, microstructure and phase constitution of the powders, as well as the sprayed coatings, were analyzed by chemical analysis, SEM and XRD. The hardness and sl...
4 CitationsSource
#1Pawel JozwikH-Index: 1
#2Wojciech PolkowskiH-Index: 13
Last. Zbigniew BojarH-Index: 19
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The paper presents an overview of current and prospective applications of Ni3Al based intermetallic alloys—modern engineering materials with special properties that are potentially useful for both structural and functional purposes. The bulk components manufactured from these materials are intended mainly for forging dies, furnace assembly, turbocharger components, valves, and piston head of internal combustion engines. The Ni3Al based alloys produced by a directional solidification are also con...
108 CitationsSource
#4Mansour Salehi (IUT: Isfahan University of Technology)H-Index: 15
Abstract TiC reinforced NiAl intermetallic matrix composite coatings on carbon steel plate were fabricated by using mechanical alloying of Ni-Al-TiC powders. The process involved trapping powder particles between the ball and cold welding together at surface. Coatings were examined using X-ray diffraction, scanning electron microscopy (SEM) and the energy dispersive X-ray spectrometry (EDS) and transmission electron microscopy (TEM). The results indicated that the volume fraction of NiAl-TiC nan...
22 CitationsSource
Piston compression ring and cylinder liner contact contributes a significant part of friction loss in an engine. Most of this loss occurs during compression and power stroke transition (i.e., between 300° to 400° crank position). It is because of the combustion gas pressure is higher in this region to enhance ring–liner contact friction. In this paper, we developed a tribodynamic model to study the transient thermoelastohydrodynamics of ring–liner contact. It takes into account the combined solu...
19 CitationsSource
#3Jun Yang (CAS: Chinese Academy of Sciences)H-Index: 23
Abstract A Ni 3 Al–Ag–Mo–BaF 2 /CaF 2 self-lubricating composite coating was fabricated by a powder metallurgical process. The tribological properties of the coating against Si 3 N 4 were investigated over a wide temperature range (25–1000 °C). The results showed that the coating had a low friction coefficient (0.24–0.38) in the entire temperature range. Lubricating mechanism analysis results indicated that Ag took effect at low temperature (below 400 °C); BaF 2 /CaF 2 began to work as a solid l...
15 CitationsSource
#1Karin Anne Xia Gong (Chalmers University of Technology)H-Index: 3
#2Heli LuoH-Index: 2
Last. Changhai Li (Chalmers University of Technology)H-Index: 8
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A number of laboratory studies have indicated that Ni3Al-based alloys have significant potential in wear-critical applications, especially in sliding wear in a temperature range between 400 and 650 °C. In this study, the wear behavior of an iron-alloyed Ni3Al with composition of Ni–18.8Al–10.7Fe–0.5Mn–0.5Ti–0.2B in atomic percentage and its composites reinforced by 6 vol.% Cr3C2-particles were investigated. Hot isostatic pressing (HIP) and casting processes were applied for preparing the materia...
29 CitationsSource
#1Hwan-Cheol Kim (CBNU: Chonbuk National University)H-Index: 18
#2In-Jin Shon (UC Davis: University of California, Davis)H-Index: 9
Last. Zuhair A. Munir (UC Davis: University of California, Davis)H-Index: 67
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Abstract The rapid sintering of nano-structured WC hard materials in a short time is introduced with a focus on the manufacturing potential of this spark plasma sintering process. The advantage of this process allows very quick densification to near theoretical density and prohibition of grain growth in nano-structured materials. A dense pure WC hard material with a relative density of up to 97.6% was produced with simultaneous application of 60 MPa pressure and electric current of 2800 A within...
126 CitationsSource
#1Peiqing La (CAS: Chinese Academy of Sciences)H-Index: 22
#2Qunji Xue (CAS: Chinese Academy of Sciences)H-Index: 77
Last. Weimin Liu (CAS: Chinese Academy of Sciences)H-Index: 92
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The tribological properties of Ni3Al-Cr7C3 composite coating under water lubrication were examined by using a ball-on-disc reciprocating tribotester. The effects of load and sliding speed on wear rate of the coating were investigated. The worn surface of the coating was analyzed using electron probe microscopy analysis (EPMA) and X-ray photoelectron spectroscopy (XPS). The results show the friction coefficient of the coating is decreased under water lubrication. The wear rate of the coating line...
20 CitationsSource
#1T. Ya. Velikanova (NASU: National Academy of Sciences of Ukraine)H-Index: 18
#2A. A. Bondar (NASU: National Academy of Sciences of Ukraine)H-Index: 6
Last. A. V. Grytsiv (NAS: National Academy of Sciences)H-Index: 1
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Phase equilibria of the Cr-Ni-C system in the melting (crystallization) range were investigated by means of metallography, microprobe analysis, powder x-ray diffraction, differential thermal analysis, and melting point technique (Pirani and Alterthum method). On the basis of received results and assessment of available literary data, the phase diagram was presented as projections of solidus, liquidus, and melting (crystallization) diagram, reaction scheme at crystallization (melting), a number o...
45 CitationsSource
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