Fe-based bulk metallic glasses: Glass formation, fabrication, properties and applications

High temperature solid-lubricating materials: A review

Self-lubricating materials are becoming more widespread in fields like metal forming or power generation due to the inability to use conventional lubricants in high-temperature (HT) applications. I...

Tribological behaviour of self-lubricating materials at high temperatures

Comparative study of the dry sliding wear behaviour of HVOF-sprayed WC–(W,Cr)2C–Ni and WC–CoCr hardmetal coatings

Thermal sprayed Fe-based amorphous coatings exhibit excellent wear and corrosion resistance, and thus have been widely utilized for enhancing the performance of material surfaces. In this paper, important research progresses achieved in regards to deposition technologies and properties of thermal sprayed Fe-based amorphous coatings are reviewed. In particular, the dependence of wear and corrosion resistance of the coatings on processing parameters, e.g., kinetic energy, particle size, gas flow rate, and heat treatment temperature are summarized. Moreover, the utilization of reinforced phases and alloy elements for enhancing the wear and corrosion resistance of the coatings are presented. It is expected that future endeavors will be dedicated to the formation mechanism of amorphous phase and “processing parameter-microstructure-macroscopic property” relationship of Fe-based amorphous coatings.

Wear and corrosion resistant performance of thermal-sprayed Fe-based amorphous coatings: A review

Adaptive NiCrAlY–Ag–Mo composite coating was deposited by atmospheric plasma spraying and its tribological properties from 20 °C to 800 °C under unlubricated conditions were evaluated using CSM high temperature tribometer Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were used to characterize the coating and the corresponding wear tracks to determine the lubrication mechanisms The results showed that NiCrAlY–Ag–Mo composite coating exhibited low friction coefficients around 03 in the entire temperature range and its wear rates were at the order of 10− 5 mm3/N m at all test temperatures Characterization of NiCrAlY–Ag–Mo coating revealed that silver provided lubrication at temperatures below 400 °C Silver molybdate and molybdenum oxide, which were formed as the temperature raised, act as lubricants at higher temperature (above 400 °C) Meanwhile, the formation mechanism of silver molybdate and molybdenum oxide was also briefly discussed

Tribological properties of adaptive NiCrAlY–Ag–Mo coatings prepared by atmospheric plasma spraying

Microstructure and tribological properties of iron-based metallic glass coatings prepared by atmospheric plasma spraying

Structure and corrosion behavior of iron-based metallic glass coatings prepared by LPPS

Composition versus friction and wear behavior of plasma sprayed WC–(W,Cr)2C–Ni/Ag/BaF2–CaF2 self-lubricating composite coatings for use up to 600 °C

WC-(W,Cr) 2 C-Ni coating was prepared by high velocity oxy-fuel spraying (HVOF). The microstructure and phase composition of the as-sprayed coating and that after oxidation at high temperature were analyzed by means of scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The oxidation behavior of as-sprayed coating and starting powders was evaluated by thermogravimetry. Dry sliding friction and wear behavior of the WC-(W,Cr) 2 C-Ni coating sliding against Si 3 N 4 ball at different temperatures (room temperature 20 °C and elevated temperature of 700 °C and 800 °C) was evaluated using an oscillating friction and wear tester. Besides, the microhardness and fracture toughness of the coating was also measured. Results show that sintering agglomerated WC-20 wt.%Cr-7 wt.%Ni powder is an effective method to prepare agglomerated and sintered WC-(W,Cr) 2 C-Ni composite powder. The excellent oxidation resistance of WC-(W,Cr) 2 C-Ni coating is mainly resulted from a double-decker shell-core microstructure formed in the coating. The composition of the outer shell is (W,Cr) 2 C phase and that of the inner shell is Cr 3 C 2 . During high-temperature friction and wear test, well remained hard WC phase in the WC-(W,Cr) 2 C-Ni coating can guarantee its good mechanical properties and wear resistance, and newly generated nano NiWO 4 , CrWO 4 and Cr 2 WO 6 particles can further improve these properties significantly.

Jie Chen

Papers

Tribological properties of adaptive NiCrAlY–Ag–Mo coatings prepared by atmospheric plasma spraying

Microstructure and tribological properties of iron-based metallic glass coatings prepared by atmospheric plasma spraying

Structure and corrosion behavior of iron-based metallic glass coatings prepared by LPPS

Composition versus friction and wear behavior of plasma sprayed WC–(W,Cr)2C–Ni/Ag/BaF2–CaF2 self-lubricating composite coatings for use up to 600 °C

Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying