Tribological properties and microstructures of Al2O3-TiC-TiB2 reinforced composites

2017 ◽  
Vol 24 (5) ◽  
pp. 715-720
Author(s):  
Peng Li
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Elastic Modulus ◽  
Dilution Rate ◽  
Tribological Properties ◽  
Molten Pool ◽  
Aviation Material ◽  
Reinforced Composites ◽  
Stabilized Zirconia ◽  
Yttria Partially Stabilized Zirconia

AbstractTi-3Al-2V alloy is an important aviation material but shows poor resistance to slid wear. Laser cladding of the Fe3Al-B4C pre-placed powders on a Ti-3Al-2V substrate can form the TiC-TiB2 reinforced composites, which improved the wear resistance of the substrate. In this study, it was noted that the addition of the Al2O3 and 7 wt.% yttria partially stabilized zirconia (YPSZ) was able to further increase the wear resistance of such composites. Al2O3 increased the dilution rate of the substrate to the laser molten pool to a certain extent; moreover, Al2O3 improved the hardness, elastic modulus and the mechanical properties of such laser clad composites. The YPSZ addition led t-ZrO2-ZrSiO4 to be produced in such composites.

scholarly journals Microstructural and Mechanical Properties of β-Type Ti–Nb–Sn Biomedical Alloys with Low Elastic Modulus

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 712 ◽  
Author(s):  
Peiyou Li ◽  
Xindi Ma ◽  
Duo Wang ◽  
Hui Zhang
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Elastic Modulus ◽  
Martensite Phase ◽  
Ti Alloy ◽  
Martensitic Phase Transition ◽  
Low Elastic Modulus ◽  
Nb Content ◽  
Biomedical Alloy ◽  
Cp Ti

The microstructural and mechanical properties of β-type Ti85-xNb10+xSn5 (x = 0, 3, 6, 10 at.%) alloys with low elastic modulus were investigated. The experimental results show that the Ti85Nb10Sn5 and Ti75Nb20Sn5 alloys are composed of simple α and β phases, respectively; the Ti82Nb13Sn5 and Ti79Nb16Sn5 alloys are composed of β and α″ phases. The content of martensite phase decreases with the increase of Nb content. The Ti82Nb13Sn5 and Ti79Nb16Sn5 alloys show an inverse martensitic phase transition during heating. The Ti85Nb10Sn5 and Ti82Nb13Sn5 alloys with the small residual strain exhibit the good superelastic properties in 10-time cyclic loading. The reduced elastic modulus (Er) of the Ti75Nb20Sn5 alloy (61 GPa) measured by using the nanoindentation technique is 2–6 times of that of human bone (10–30 GPa), and is smaller than that of commercial Ti-6Al-4V biomedical alloy (120 GPa). The Ti75Nb20Sn5 alloy can be considered as a novel biomedical alloy. The wear resistance (H/Er) and anti-wear capability (H3/Er2) values of the four alloys are higher than those of the CP–Ti alloy (0.0238), which indicates that the present alloys have good wear resistance and anti-wear capability.

scholarly journals INVESTIGATION OF CHARACTERISTICS OF SPRAYED NI-CR AND NI-CR-WC COATINGS / PURKŠTINIŲ NI-CR IR NI-CR-WC DANGŲ SAVYBIŲ TYRIMAS

2017 ◽  
Vol 8 (6) ◽  
pp. 615-620
Author(s):  
Ovidijus Jarašūnas ◽  
Olegas Černašėjus
Keyword(s):  
Wear Resistance ◽  
Elastic Modulus ◽  
Chemical Composition ◽  
Tribological Properties ◽  
Substrate Heating ◽  
Steel Substrates ◽  
Sprayed Coatings

The article deals with the flame sprayed Ni-Cr and Ni-Cr-WC coatings on construction S235 steel substrates. Before spraying, the surfaces of substrates were treated mechanically. Using the different chemical composition of Ni-Cr and Ni-Cr-WC spraying powder and additional substrate heating till 250–290 °C, were sprayed coatings. The microstructure, porosity, hardness, elastic modulus, wear resistance of the Ni-Cr and Ni-Cr-WC coatings were investigated in the work. The influence of the chemical composition and WC content of the coatings on the various physical and tribological properties of the coatings were evaluated. Also the dependence of these coatings characteristics was investigated. Straipsnyje nagrinėjamos liepsninio purškimo būdu ant konstrukcinio S235 plieno substrato užpurkštos Ni-Cr dangos. Substrato paviršiai prieš purškiant buvo apdoroti mechaniniu būdu. Naudojant skirtingos cheminės sudėties Ni-Cr ir Ni-Cr-WC purškimo miltelius ir papildomai pakaitinus substratą iki 250–290 °C temperatūros, buvo užpurkštos dangos. Darbe ištirta gautų Ni-Cr ir Ni-Cr-WC dangų mikrostruktūra, akytumas, kietumas, tamprumo modulis ir atsparumas dilimui. Įvertinta dangų cheminės sudėties ir WC karbidų įtaka įvairioms dangų fizikinėms, tribologinėms savybėms, nustatytos šių dangų charakteristikų priklausomybės.

scholarly journals Effect of heat treatment on the tribological properties of Nickel-Boron electroless coating

2018 ◽  
Vol 27 (47) ◽  
pp. 101
Author(s):  
Sandra Arias ◽  
Maryory Gómez ◽  
Esteban Correa ◽  
Félix Echeverría-Echeverría ◽  
Juan Guillermo Castaño
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Carbon Steel ◽  
Tribological Properties ◽  
Tribological Performance ◽  
Dry Sliding ◽  
Electroless Coating ◽  
Before And After ◽  
Properties Of Materials

Nickel-Boron autocatalytic coatings are widely used in several industries to improve mechanical properties of materials such as hardness and wear resistance. Tribological properties were evaluated in Ni-B autocatalytic coatings deposited on AISI/SAE 1018 carbon steel before and after a heat treatment at 450 °C for one hour. Tribological tests were carried out by dry sliding, using a load of 5 N and a sliding speed of 0.012 m/s, in a homemade ball-on-disk tribometer, which followed ASTM G99 standard. According to the tribological evaluation, the heat treatments applied to Ni-B coatings improved their tribological performance. This research corroborates that by applying an adequate heat treatment, hardness and wear resistance of Ni-B coatings can be improved significantly.

scholarly journals Mechanical Properties and Sliding-impact Wear Resistance of Self-adhesive Resin Cements

2016 ◽  
Vol 41 (3) ◽  
pp. E83-E92 ◽  
Author(s):  
T Furuichi ◽  
T Takamizawa ◽  
A Tsujimoto ◽  
M Miyazaki ◽  
WW Barkmeier ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Sliding Wear ◽  
Resin Cement ◽  
The Self ◽  
Volume Loss ◽  
Resin Cements ◽  
Adhesive Resin

SUMMARY The present study determined the mechanical properties and impact-sliding wear characteristics of self-adhesive resin cements. Five self-adhesive resin cements were used: G-CEM LinkAce, BeautiCem SA, Maxcem Elite, Clearfil SA Automix, and RelyX Unicem 2. Clearfil Esthetic Cement was employed as a control material. Six specimens for each resin cement were used to determine flexural strength, elastic modulus, and resilience according to ISO specification #4049. Ten specimens for each resin cement were used to determine the wear characteristics using an impact-sliding wear testing apparatus. Wear was generated using a stainless-steel ball bearing mounted inside a collet assembly. The maximum facet depth and volume loss were determined using a noncontact profilometer in combination with confocal laser scanning microscopy. Data were evaluated using analysis of variance followed by the Tukey honestly significantly different test (α=0.05). The flexural strength of the resin cements ranged from 68.4 to 144.2 MPa; the elastic modulus ranged from 4.4 to 10.6 GPa; and the resilience ranged from 4.5 to 12.0 MJ/m3. The results for the maximum facet depth ranged from 25.2 to 235.9 μm, and volume loss ranged from 0.0107 to 0.5258 mm3. The flexural properties and wear resistance were found to vary depending upon the self-adhesive resin cement tested. The self-adhesive cements tended to have lower mechanical properties than the conventional resin cement. All self-adhesive resin cements, apart from G-CEM LinkAce, demonstrated significantly poorer wear resistance than did the conventional resin cement.

Mechanical and Tribological Properties of Nylon 1212 Modified with Brown Corundum Ash and Solid Lubricants

2011 ◽  
Vol 295-297 ◽  
pp. 1573-1577 ◽  
Author(s):  
Gao Liang Zhang ◽  
Qing Xiang Zhao ◽  
Min Ying Liu ◽  
Peng Fu ◽  
Yi Bo Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Environmental Pollution ◽  
Tribological Properties ◽  
Tribological Property ◽  
Solid Lubricants ◽  
Screw Extruder ◽  
Mechanical And Tribological Properties ◽  
Ptfe Composite ◽  
Twin Screw

Brown Corundum Ash(BCA) was used to modify nylon 1212(PA1212), which is produced during the production of electric fused brown corundum alumina and will causes serous environmental pollution if it is not recycled. In order to improve the tribological property of PA1212 composites, Graphite, MoS2 and PTFE were used. The composites were prepared by a twin-screw extruder through melt intercalation. The mechanical properties and the wear resistance of the PA1212/Brown Corundum Ash/graphite/MoS2/PTFE composite were studied. The shearing area of composite and the worn surfaces were examined by scanning electric microscope (SEM).

Study of Mechanical Properties of Magnesium Oxide Doped Alumina (Al2O3) and Yttria Stabilized Zirconia (YSZ) Composite for Medical Applications

2012 ◽  
Vol 506 ◽  
pp. 521-524 ◽  
Author(s):  
A. Phothawan ◽  
K. Nganvongpanit ◽  
T. Tunkasiri ◽  
Sukum Eitssayeam
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Magnesium Oxide ◽  
Sintering Temperature ◽  
The Body ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Electron Microscopes ◽  
Pin On Disk ◽  
Scanning Electron Microscopes

The aim of this research is to study the mechanical properties such as hardness ,wear resistance etc , of the magnesium oxide (MgO) doped alumina (Al2O3) and yttria stabilized zirconia (YSZ) composite, We first prepared MgO-doped Al2O3(denoted as Al4) by mixing Al2O3powder and 0.4 wt% of MgO powder. After that Al4powder was mixed YSZ powder, with the formula [(x)Al4- (100-x)YS when x was varied from 0 - 100 by wt%. The samples were sintered at 1450, 1500, 1550, 1600 and 1650 °C. In addition, microstructure of the surface was studied employing both optical and scanning electron microscopes. The hardness of the surface was investigated by Vickers indentation technique and pin on disk apparatus was employed for wear rate measurement. The results showed that the density and volume shrinkage decreased with the increase of Al4content. The grain size and porosity of the specimens tend to decrease when the sintering temperature increases. The hardness and wear resistance of the samples increased with the increase of Al4up to 90 %. It was also found that the material is not toxic to the body.

Tribological properties of bismaleimide reinforced with Si-containing benzoxazine monomer

2021 ◽  
pp. 095400832199079
Author(s):  
Ju-xiang Yang ◽  
Yuan Jia ◽  
Pengna Li ◽  
Ping Sun
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Glass Transition ◽  
Thermal Properties ◽  
Tribological Properties ◽  
Silane Coupling Agent ◽  
Mechanical Performance ◽  
The Novel ◽  
Mechanical And Tribological Properties ◽  
Silane Coupling

To improve the mechanical and tribological properties of bismaleimide (BMI) resin, a novel Si-containing benzoxazine (Si-BOZ) monomer was synthesized using a solvent process and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane as a silane coupling agent. The novel Si-BOZ monomer was subsequently blended with BMI to prepare Si-BOZ/BMI polymer alloys. Furthermore, the effect of Si-BOZ content on the mechanical, tribological, and thermal properties of Si-BOZ/BMI alloys was investigated. The results revealed that the addition of Si-BOZ to BMI improved the mechanical properties and wear resistance of Si-BOZ/BMI; moreover, the glass transition temperature of cured Si-BOZ/BMI alloys was lower than that of pure BMI resin. These results confirmed that the increase in wear resistance of Si-BOZ/BMI alloys can be attributed to the increase in thermal resistance and improvement in mechanical performance owing to the addition of Si-BOZ.

Improving the Tribological Properties of Self-Lubricating Al-Sn Alloys by their Severe Plastic Processing

2013 ◽  
Vol 379 ◽  
pp. 110-114 ◽  
Author(s):  
N.M. Rusin ◽  
A.L. Skorentsev
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
Tribological Properties ◽  
Structure And Properties ◽  
Angular Pressing ◽  
Plastic Processing ◽  
Interphase Boundaries ◽  
Sintered Alloys

The influence of equal channel angular pressing by route A on the structure and properties of sintered Al-40Sn alloys was investigated. It was founded that the microstructure of sintered alloys very strong correlated with the type of initial powders that, nevertheless, not affects on mechanical properties of sintered alloys. The sintered structure of alloys was transformed in the layered one, using the pressing. It results in the square of interphase boundaries enlarging that gives to Al-40Sn alloys some additional strengthening and wear resistance.

scholarly journals Characteristics Of Aluminium ADC 12/SiC Composite with the Addition of TiB and Sr Modifier

2019 ◽  
Vol 130 ◽  
pp. 01004
Author(s):  
Astari Indarsari ◽  
Anne Zulfia Syahrial ◽  
Budi Wahyu Utomo
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Elastic Modulus ◽  
Wear Rate ◽  
Thermal Resistance ◽  
Aluminium Alloy ◽  
Eutectic Phase ◽  
Grain Refiner ◽  
Brake Shoe

The addition of silicon carbide (SiC) as a reinforce in a composite can improve mechanical properties. In this study aluminium ADC 12 (Al-Si-Aluminium Alloy) is treated with an addition of SiC varied from (1; 1.5; 2; 2.5 to 3) vf% and mixed with 0.18 wt% Sr to change the morphology of the silicone eutectic phase and 0.15 wt% titanium boron (TiB) was added as a grain refiner as well as the addition of 5 wt% magnesium (Mg) to increase the wettability. All materials were fabricated by stir cast method. This research is conducted to obtain the candidate material for application in train's brake shoe and bearing. This kind of usage requires high mechanical properties such as wear resistance, thermal resistance, good elastic modulus and lightweight. The composites were characterised by both mechanical properties and microstructure. The result shows that there is an increase in the mechanical properties of aluminium ADC 12 /SiC composite compared to unreinforced with the value of 144 MPa of strength, 53 HRB of hardness, and 0.0049 mm3 m–1 of wear rate. As a result, the higher addition of the SiC results in the better mechanical properties for the composite.

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