Study the effect of nitrogen content on the friction and wear properties of Zr-Cu-Ni-Al bulk metallic glasses

2021 ◽  
pp. 1-18
Author(s):  
Yugan Chen ◽  
Pingjun Tao ◽  
Weijian Zhang ◽  
Zhenghua Huang ◽  
Fuhai Li ◽  
...  
Keyword(s):  
Wear Rate ◽  
Metallic Glass ◽  
Metallic Glasses ◽  
Friction And Wear ◽  
Energy Dispersive Spectrometer ◽  
Bulk Metallic Glasses ◽  
Amorphous Structure ◽  
Wear Properties ◽  
Casting Method ◽  
Friction And Wear Properties

Abstract The effects of nitrogen on friction and wear properties of Zr-based bulk metallic glasses were investigated experimentally. Preparation of Amorphous Bars by copper mold suction casting method. XRD was used to characterize the structure of samples, which proved their amorphous structure. The surface properties of the samples were studied with a microhardness tester and a friction and wear tester. The wear surfaces of the sample were analyzed by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results show that the introduction of nitrogen improves the hardness and wear resistance of Zr-based metallic glass. Compared with the non-N-doped Zr-based metallic glass, the N-doped Zr-based metallic glasses have higher hardness and lower wear rate. In particular, the sample with 1.5% nitrogen doping has the largest hardness (578.58hv) and the lowest wear rate (1.04 × 10−3mm3 N−1 m−1). The wear types of N-doped Zr-based amorphous on GCr15 are mainly abrasive wear and adhesive wear.

Water Absorption, Friction and Wear Behaviors of Polypropylene Composites Filled with Hydroxyapatite

2017 ◽  
Vol 733 ◽  
pp. 60-64
Author(s):  
Munir Tasdemir ◽  
Ozkan Gulsoy
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Water Absorption ◽  
Polymer Composites ◽  
Friction And Wear ◽  
Wear Properties ◽  
Polypropylene Composites ◽  
Friction And Wear Properties

In the present work, the friction and wear properties of Polypropylene (PP) based composites filled with Hydroxyapatite (HA) particles were studied. Fillers contents in the PP were 10, 20, and 30 wt%. The effects of hydroxyapatite ratio on the water absorption, friction and wear properties of the polymer composites is presented. The result showed that the addition of HA to the composite changed the water absorption, friction coefficient and wear rate.

scholarly journals Study on Friction and Wear Properties of Pantograph Strip/Copper Contact Wire for High-Speed Train

2014 ◽  
Vol 8 (1) ◽  
pp. 125-128 ◽  
Author(s):  
Tao Ding ◽  
Wenjing Xuan ◽  
Qiudong He ◽  
Hao Wu ◽  
Wei Xiong
Keyword(s):  
Wear Rate ◽  
Electric Current ◽  
High Speed ◽  
Friction And Wear ◽  
Optical Microscope ◽  
Wear Properties ◽  
Contact Wire ◽  
Arc Erosion ◽  
The Coefficient Of Friction ◽  
Friction And Wear Properties

A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than that in the presence of electric current. The wear rate of carbon strip materials is generally not more than 0.014g/km. In particular, the wear rate under the electric current of 240 A is 14 times more than that in the absence of electric current. By observing the scar of worn surface with optical microscope, it can be found that there are obvious slip scars and arc erosive pits. The dominated wear mechanisms are abrasive wear and arc erosion in electrical sliding frictional process.

Wear Behaviors of MoSi2 at Elevated Temperatures

2008 ◽  
Vol 368-372 ◽  
pp. 961-963
Author(s):  
Hou An Zhang ◽  
Xiao Pin Hu ◽  
Wei Cheng Tan ◽  
Cun Shi
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Vacuum Furnace ◽  
Wear Properties ◽  
Brittle Transition ◽  
Deformation And Fracture ◽  
Friction And Wear Properties ◽  
Worn Surface

MoSi2 was prepared by SHS, and then pressed under 300 MPa at room temperature and sintered at 1600 °C for 1 h in a vacuum furnace. The tribological properties of MoSi2 against Al2O3 in the temperature range from 700°C to 1100 °C were investigated. Microphotographs and phases of the worn surface of MoSi2 were observed by SEM and XRD. Results showed that MoSi2 has well friction and wear properties below 900 °C. When temperature rises from 900 °C to 1000 °C, wear rate of MoSi2 is raised by 20.8% which is attribute to the change of wear mechanism. The main wear mechanisms of MoSi2 are adhesion and oxidation at high temperatures. When over 900 °C, because of ductile - brittle transition characteristic of this material, plastic deformation and fracture are also found on the worn surface of MoSi2. This leads to the high wear rate of MoSi2.

scholarly journals Effects of CeO2 Content on Friction and Wear Properties of SiCp/Al-Si Composite Prepared by Powder Metallurgy

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4547
Author(s):  
Bin Yang ◽  
Aiqin Wang ◽  
Kunding Liu ◽  
Chenlu Liu ◽  
Jingpei Xie ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Wear Properties ◽  
Minimum Value ◽  
Maximum Value ◽  
Friction And Wear Properties

SiCp/Al-Si composites with different CeO2 contents were prepared by a powder metallurgy method. The effect of CeO2 content on mechanical properties, friction and wear properties of the composites was studied. The results show that with the increase in CeO2 content from 0 to 1.8 wt%, the density, hardness, friction coefficient of the composites first increases and then decreases, the coefficient of thermal expansion (CTE) and wear rate of the composites first decreases and then increases. When the content of CeO2 was 0.6 wt%, the density and hardness of the composite reached the maximum value of 98.54% and 113.7 HBW, respectively, the CTE of the composite reached the minimum value of 11.1 × 10−6 K−1, the friction coefficient and wear rate of the composite reached the maximum value of 0.32 and the minimum value of 1.02 mg/m, respectively. CeO2 has little effect on the wear mechanism of composites, and the wear mechanism of composites with different CeO2 content is mainly abrasive wear under the load of 550 N. Compared with the content of CeO2, load has a great influence on the wear properties of the composites. The wear mechanism of the composites is mainly oxidation wear and abrasive wear under low load. With the increase in load, the wear degree of abrasive particles is aggravated, and adhesive wear occurs under higher load.

Effect of Graphite on the Friction and Wear Properties of Cu-Based Friction Materials

2014 ◽  
Vol 788 ◽  
pp. 621-626 ◽  
Author(s):  
Jing Dan Wei ◽  
Hua Chen
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Properties ◽  
Friction Materials ◽  
Graphite Content ◽  
Lubricating Film ◽  
Properties Of Materials ◽  
Friction And Wear Properties ◽  
High Graphite

Cu-based friction materials were prepared by powder metallurgy technology. The effect of the graphite on friction and wear properties of materials was investigated. The experimental results indicate that the wear rate of the materials increased with increasing speed. The wear rate of the materials with the graphite with the size of 300~600μm decreased with increasing graphite content, indicating that the graphite size of 300~600μm showed the good lubricating effect. The lubricating film made the friction coefficient decrease. The wear resistance of materials with 100~300μm graphite was degraded at high graphite content, and the graphite size of 100~300μm has bad effect on the strength of materials. The wear debris made the friction coefficient slightly increase with the increase of graphite content. The material with the graphite content of 10% and the graphite size of 300~600μm has the best friction and wear properties.

Friction and Wear Properties of PTFE Composites Against 6061-T6 Aluminum Alloy Under Hydrogen Atmosphere

2011 ◽  
Author(s):  
Y. Sakano ◽  
T. Iwai ◽  
Y. Shoukaku
Keyword(s):  
Aluminum Alloy ◽  
Wear Rate ◽  
Friction And Wear ◽  
Wear Track ◽  
Hydrogen Atmosphere ◽  
Specific Wear Rate ◽  
Wear Properties ◽  
Friction And Wear Properties ◽  
Ptfe Composites ◽  
Alloy 6061

The friction and wear properties of polymer were investigated under a hydrogen atmosphere, by using PTFE (polytetrafluoroethylene) and two kinds of PTFE composites. Experiments were also conducted in air, nitrogen, and vacuum environment. The experiment carried out by pin-on-disk friction and wears apparatus in the vacuum chamber. Pin specimens are no filling PTFE, Gr-filled PTFE (Gr filled with 25 wt%) and MoS2–filled PTFE (MoS2 filled with 25 wt%). Friction disk is aluminum alloy 6061-T6 with 0.02μm surface roughness. Aluminum alloy 6061-T6 is able to use for apparatus for hydrogen. After experiments, specific wear rate was calculated, specimen surface, wear track and wear debris were observed, surface profile of the wear track were measured. The specific wear rate of unfilled PTFE and PTFE/MoS2 of in air was lower than the other atmospheres. The A6061-T6 disk was worn by PTFE pin specimens and in the case of wear track was much rougher, the specific wear rate of pin specimens tended to increase without unfilled PTFE in air and PTFE/Gr.

Investigation on the Fabrication and Properties of the Cu Base Friction Composites

2020 ◽  
Vol 984 ◽  
pp. 125-130 ◽  
Author(s):  
Tian Guo Wang ◽  
X.Y. Liu ◽  
J.J. Hua
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Frictional Property ◽  
Wear Properties ◽  
Friction Materials ◽  
Friction Factors ◽  
Fe Content ◽  
Friction And Wear Properties

Cu-based friction materials were prepared by powder metallurgy technology. The effect of Fe content on friction and wear properties of Cu-based friction materials has been investigated. The results indicate that Fe content has great effects on the wear ability of Cu-based friction materials. Fe works as frictional component in copper-based friction materials, influening the mechanical and frictional property of materials. With increasing Fe content, the hardness and friction coefficient of Cu-based friction materials stability increase, the wear rate of the friction materials decreases. When Fe content is 6%, the materials posses stably high friction factors, as well as good wear ability.

Explosive Welding of ZrTiCuNiBe Bulk Metallic Glass to Crystalline Metallic Plates

2007 ◽  
Vol 566 ◽  
pp. 119-124 ◽  
Author(s):  
Akira Chiba ◽  
Yoshihito Kawamura ◽  
Minoru Nishida
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Metallic Glasses ◽  
Explosive Welding ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Amorphous Structure ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Slow Cooling

Recently, a number of amorphous alloys that possess high glass-forming ability and a wide supercooled liquid region before crystallization have been discovered. Especially, bulk metallic glasses, which are made in bulk form with a thickness of ~10 mm at slow cooling rates of the order of 1~100 K/s, have been noted as an industrial application. Hence the welding of bulk metallic glasses to other materials is very important. Explosive welding of most popular Zr41.2Ti13.8Cu10Ni12.5Be22.5 bulk metallic glass to crystalline pure Ti and SUS304 plates is investigated in this paper. The BMGs was found to retain the amorphous structure and the original mechanical properties. The sound bonding with other materials is expected to push forward the application of bulk metallic glass for industrial usage.

Sign in / Sign up

Export Citation Format

Share Document