The effects of surface oxidation and segregation on the adhesional wear behavior of aluminum—bronze alloys

1994 ◽  
Vol 8 (1) ◽  
pp. 11-28 ◽  
Author(s):  
Robert A. Poggie ◽  
James J. Wert ◽  
Lawrence A. Harris
Keyword(s):  
Wear Behavior ◽  
Surface Oxidation ◽  
Aluminum Bronze

Effect of surface oxidation on the nm-scale wear behavior of a metallic glass

2011 ◽  
Vol 109 (8) ◽  
pp. 083515 ◽  
Author(s):  
A. Caron ◽  
P. Sharma ◽  
A. Shluger ◽  
H.-J. Fecht ◽  
D. V. Louzguine-Luzguin ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Wear Behavior ◽  
Surface Oxidation ◽  
Effect Of Surface

scholarly journals Tribological Properties of Mo-Si-B Alloys Doped with La2O3 and Tested at 293–1173 K

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2011 ◽  
Author(s):  
Wenhu Li ◽  
Taotao Ai ◽  
Hongfeng Dong ◽  
Guojun Zhang
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Laser Scanning ◽  
Wear Behavior ◽  
Surface Oxidation ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Low Friction ◽  
Friction Coefficients ◽  
Wear Rates

According to the stoichiometric ratios of Mo-10Si-7B, Mo-12Si-8.5B, Mo-14Si-9.8B, and Mo-25Si-8.5B, some new Mo-Si-B alloys doped with 0.3 wt % lanthanum (III) oxide (La2O3) were prepared via liquid-liquid (L-L) doping, mechanical alloying (MA), and hot-pressing (HP) sintering technology. The phase-composition and microstructure were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). The worn surfaces of the plate specimens were studied by confocal laser scanning microscopy (CLSM). Then, the tribological properties of Mo-Si-B alloy doped with sliding plate specimens of 0.3 wt % La2O3 were investigated against the Si3N4 ball specimens. The friction coefficients of Mo-Si-B alloys decreased and the wear rates of the alloys increased with test load. The high-temperature friction and wear behavior of Mo-Si-B alloy are related to the surface-oxidation and contact-deformation of the alloy at a high temperature. The low friction coefficients and the reduced wear rates are thought to be due to the formation of low friction MoO3 films. MoO3 changed the contact state of the friction pairs and behaved as lubricating films.

Wear behavior and mechanism of a sliding pair of 0. 1C-3Cr-2W-V nitrided steel rubbing against an aluminum bronze alloy

2016 ◽  
Vol 23 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Guang-hong Wang ◽  
Sheng-guan Qu ◽  
Zhi-hua Xiong ◽  
Fu-qiang Lai ◽  
Xiao-qiang Li ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Aluminum Bronze ◽  
Bronze Alloy ◽  
Nitrided Steel

scholarly journals Influence of Gas Pressure on the Mechanical and Tribological Properties of Cu-Al Coatings Deposited via Thermal Spray

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 722
Author(s):  
Morales ◽  
Piamba ◽  
Olaya
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Mechanical Response ◽  
Wear Behavior ◽  
Deposition Process ◽  
Gas Pressure ◽  
Aluminum Bronze ◽  
Porosity Level ◽  
X Ray ◽  
Mechanical And Tribological Properties

We report the results of the influence of the acetylene and oxygen gas pressure on the wear resistance of aluminum–bronze coatings deposited on naval brass substrate by means of the thermal (flame) deposition process. The coatings were characterized by means of scanning electronic microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The adhesion was determined with cross-hatching tests, and the mechanical response was assessed by measuring the nanohardness and by three-body and ball-on-disk abrasive wear tests. The results indicate that changes in the pressure and flow of the gas affect the morphology and the mechanical properties of the coatings, and these effects have consequences for the wear behavior of the coatings. Before the projection of the coatings, numerical simulations were carried out using Jets & Poudres software, where the collision speed of the particles was identified as the most significant factor that influences the mechanical properties and the performance of the coating. The gas pressure modified the hardness and the porosity level, which allowed improving the wear resistance.

Effect of Ce on Wear Behavior of Plasma Spray Welded Novel Aluminum Bronze Coatings

2011 ◽  
Vol 418-420 ◽  
pp. 831-834
Author(s):  
Wen Sheng Li ◽  
Yi Liu
Keyword(s):  
Wear Resistance ◽  
Rare Earth ◽  
Carbon Steel ◽  
Plasma Spray ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Aluminum Bronze ◽  
Properties Of Coatings ◽  
Substrate Effects ◽  
Coating Microstructure

Aluminum bronze powders with free and 0.1wt%Ce were plasma spray welded on 45# carbon steel substrate, Effects of rare earth Ce on the microstructure and wear resistance of plasma spray welded novel aluminum bronze coatings were investigated. Tribological properties of coatings were tested on reciprocating sliding tester. Results showed that a small amount of Ce (0.1wt %) in novel aluminum bronze coating can refine the coating microstructure and the coating with 0.1wt%Ce process higher wear resistance compared to the Ce-free coating. Both of the coatings have different wear mechanisms.

scholarly journals Effect of Heat Treatment on Tribological Characteristics of CuAl10Ni5Fe4 Nickel Aluminum Bronze

2018 ◽  
Vol 778 ◽  
pp. 61-67 ◽  
Author(s):  
Muhammad Kamran Yaseen ◽  
Muhammad Mansoor ◽  
Haider Ali Ansari ◽  
Sajawal Hussain ◽  
Shaheed Khan
Keyword(s):  
Heat Treatment ◽  
Wear Behavior ◽  
Tribological Characteristics ◽  
Thermal Treatments ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Corrosion Properties ◽  
Treatment Processes ◽  
Nickel Aluminum Bronze ◽  
Hot Rolled

Al bronze are the choice of material for relatively high wear applications besides appreciable mechanical and corrosion properties. In present work, the effect of different heat treatment processes on tribological characteristics of Ni-Al bronze (CuAl10Ni5Fe4, UNS C63000) has been studied. The hot rolled bar of 30 mm diameter was subjected to annealing, quenching and aging processes separately, consequently their effect on microstructure was studied and co-related with tribological characteristics. The formation and nucleation of various phases due to the thermal treatments were observed using optical microscopy. The wear behavior was studied using ball on disk arrangement with 100Cr6 ball and Ni-Al Bronze samples as disk. The characteristics and mechanism of wear track was studied using scanning electron microscope. It was observed that the water quenched sample followed by aging at 300°C exhibited best tribological characteristics.

Microstructure and Tribological Properties of a Ni-Base Laser Cladding on Aluminum Bronze

2010 ◽  
Vol 160-162 ◽  
pp. 100-105
Author(s):  
Jian Lin Xu ◽  
Bo Yang ◽  
Chun Yan Ju ◽  
Li Hui Zhang
Keyword(s):  
Wear Rate ◽  
Abrasive Wear ◽  
Laser Cladding ◽  
Tribological Properties ◽  
Wear Mechanism ◽  
Dry Friction ◽  
Wear Behavior ◽  
Solidification Rate ◽  
Aluminum Bronze ◽  
Lubricate Condition

In the paper, a Ni-base composite cladding was cladded on the surface of QAl9-4 aluminum bronze by laser cladding technology, as well as its microstructure and tribological properties are studied. The results show that the microstructure of laser cladding is affected by solidification rate, and its wear behavior mainly lies on microstructure and lubrication condition. The microstructure of laser cladding is made up of cellular crystal and dendrite crystal. The microstructure of the surface cladding is cellular crystal, the middle section is crassitude dendrite crystal, and the bottom is coarse dendrite crystal and cellular crystal. Under dry friction condition, wear mechanism is abrasive wear and shedding strengthen phase, which has higher volume’s wear rate. Under lubricate condition, wear mechanism is abrasive wear and adhere wear, which has lower volume’s wear rate than that of dry friction. The average friction coefficient of the cladding under dry and lubricate condition are 0.39 and 0.15, the volume’s wear rate are 7.88×10-8mm3/N.mm and 1.56×10-9mm3/ N.mm, respectively. Therefore, the cladding has favorable wear resistance property under lubricate condition，and can be used as an excellent wearable material.

Growth of hematite by surface oxidation of olivine

1988 ◽  
Vol 46 ◽  
pp. 800-801
Author(s):  
S. McKernan ◽  
C. B. Carter
Keyword(s):  
Electron Microscope ◽  
Surface Oxidation ◽  
Thin Foil ◽  
Nucleation And Growth ◽  
Ion Milling ◽  
Annealed Material ◽  
Thin Foils ◽  
Natural Olivine ◽  
Approximate Composition ◽  
Second Phases

The oxidation of natural olivine has previously been performed on bulk samples and the reactions followed by preparation of TEM specimens from the annealed material. These results show that below ∼1000°C hematite and amorphous silica are formed, particularly around dislocations. At higher temperatures magnetite and some enstatite-like phase are formed. In both cases the olivine is left almost totally Fe depleted. By performing the oxidation on characterized thin TEM specimens it is possible to obtain more information on the nucleation and growth of the second phases formed. The conditions in a thin foil, however, are very different from those in the bulk especially with regard to surface effects. The nucleation of precipitates in particular may be expected to occur differently in these thin foils than in the bulk.TEM specimens of natural olivine (approximate composition Mg+Fe+Si2o4) which had been annealed at 1000°C for 1 hr were prepared by mechanical polishing and dimpling, followed by Ar ion milling to perforation. The specimens were characterized in the electron microscope and then heated in air in alumina boats to 900°C for between 30 and 180 minutes.

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