Journal ArticleDOI
Improved hardness and wear resistance of plasma sprayed nanostructured NiCrBSi coating via short-time heat treatment
TLDR
In this article, NiCrBSi alloy coatings deposited by atmospheric plasma spray technology were heated at 440°C, 460°C and 480°C for a short-time respectively to achieve a better understanding of the relationship between their microstructures and properties.Abstract:
NiCrBSi alloy coatings deposited by atmospheric plasma spray technology were heated at 440 °C, 460 °C, and 480 °C for a short-time respectively to achieve a better understanding of the relationship between their microstructures and properties. Optical microscopy, scanning electron microscopy, X-ray diffraction, transmission electron microscopy and tribological tests were conducted to evaluate the microstructures and wear performance of the coatings. Both the hardness and wear resistance of the coatings increase at the initial stage of short-time heat treatment followed by decreasing. The heat-treated coatings show 15.4% higher maximum hardness and 60% lower minimum wear volume than the as-sprayed one. The as-sprayed NiCrBSi coating possesses a mixed microstructure mainly composed of the crystalline phases and the amorphous phase (about 10 vol%). After 3-min heat treatment at 480 °C, the volume fraction of the amorphous phase decreases to 1.6 vol%, while the fractions of compounds (such as Ni3B and Cr3B4) and γ-Ni increase correspondingly. The precipitates of Ni3B and Cr3B4 are responsible for the hardening of the coatings. As heat treatment proceeds, the γ-Ni grains coarsen, leading to a deceasing tendency in the hardness and wear resistance of the coatings. As the abrasive modes of the coatings are not varied after short-time heat treatment, the hardness of the coatings plays a dominant role in the wear resistance of the coatings.read more
Citations
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Journal ArticleDOI
A Review on Biomedical Titanium Alloys: Recent Progress and Prospect
Lai-Chang Zhang,Liang-Yu Chen +1 more
Journal ArticleDOI
Surface modification of titanium and titanium alloys: Technologies, developments, and future interests
Journal ArticleDOI
Automatic remelting and enhanced mechanical performance of a plasma sprayed NiCrBSi coating
Liang-Yu Chen,Liang-Yu Chen,Haiyang Wang,Cuihua Zhao,Sheng Lu,Ze-Xin Wang,Jin Sha,Shujin Chen,Lai-Chang Zhang +8 more
TL;DR: In this paper, the authors developed a remelting method to remelt the as-sprayed NiCrBSi by plasma gun in an automatic mode using optimized parameters, which reduced the porosity, eliminated the lamellar boundaries and promoted the formation of metallurgical bonding at the coating/substrate interface.
Journal ArticleDOI
Microstructural examination and corrosion behavior of selective laser melted and conventionally manufactured Ti6Al4V for dental applications
TL;DR: As candidate dental implant materials, the corrosion behavior of both SLM and wrought Ti6Al4V was assessed in artificial saliva and deionized water containing various species i.e. fluoride (F), calcium chloride (CaCl2) and lactic acid (LA).
Journal ArticleDOI
A study on the influence of substrate pre-heating on mitigation of cracks in direct metal laser deposition of NiCrSiBC-60%WC ceramic coating on Inconel 718
Abhijit Sadhu,Amit Choudhary,Sagar Sarkar,Amal M. Nair,Pravanjan Nayak,Sagar Dadasahed Pawar,Gopinath Muvvala,Surjya K. Pal,Ashish Kumar Nath +8 more
TL;DR: In this article, the influence of cooling rate on crack mitigation in multilayer direct metal laser deposition of NiCrSiBC-60% WC on Inconel 718 substrate has been investigated by monitoring the thermal history of the molten pool using an IR pyrometer.
References
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Dual-phase nanostructuring as a route to high-strength magnesium alloys
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Electroless Ni-B coatings: preparation and evaluation of hardness and wear resistance
TL;DR: In this paper, the hardness and wear resistance of electroless Ni-B coatings were evaluated using X-ray diffraction (XRD), Leitz microhardness tester and a pin-on-disc wear test apparatus.
Journal ArticleDOI
Enhanced corrosion and wear resistance properties of carbon fiber reinforced Ni-based composite coating by laser cladding
TL;DR: In this paper, carbon fibers reinforced nickel-based composite coatings (CFs/Ni) were fabricated on the surface of 1Cr13 stainless steel by laser cladding (LC) to enhance the wear resistance and corrosion resistance of Ni-based coatings.
Journal ArticleDOI
Effect of crystallinity on the impact toughness of a La-based bulk metallic glass
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