Tribological properties of metals, metal-like compounds, and composite materials under high temperatures

Tribotechnical indicators of environmentally friendly frictional composite materials with phenol-formaldehyde matrix are studied. Friction tests were carried out on a MMW-1 vertical tribometer according to the pin-on-disk scheme. Keywords: brake pads, composites, friction and wear, plasticizers, degradation, porosity. [email protected]

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Tribological properties of calcium fluoride-based solid lubricant coatings at high temperatures

Thin Solid Films ◽

10.1016/s0040-6090(97)00569-5 ◽

1998 ◽

Vol 317 (1-2) ◽

pp. 481-485 ◽

Cited By ~ 8

Author(s):

Y Pauleau ◽

P Juliet ◽

R Gras

Keyword(s):

High Temperatures ◽

Tribological Properties ◽

Calcium Fluoride ◽

Solid Lubricant

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Bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials at high temperatures

10.36652/0042-4633-2021-6-30-34 ◽

2021 ◽

pp. 30-34

Author(s):

Keyword(s):

Composite Materials ◽

Bearing Capacity ◽

High Temperatures ◽

Limit Load ◽

Carbon Composite ◽

Reinforcement Scheme ◽

Carbon Composite Material ◽

Carbon Composite Materials ◽

Threaded Joints ◽

Joint Limit

The bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials (CCCM) with a 4DL reinforcement scheme in the temperature range from 20 to 2500 °C is experimentally determined. Recommendations are given for the design of CCCM threaded joints for operation at high temperatures. Keywords: carbon-carbon composite material, threaded joint, limit load, bearing capacity, threaded pair, high temperature. [email protected]

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Analysis of tribological properties of graphite and aluminum composite materials prepared by powder metallurgy technique

Materials Express ◽

10.1166/mex.2020.1692 ◽

2020 ◽

Vol 10 (5) ◽

pp. 663-670

Author(s):

Zhigang Wang ◽

Jun Li ◽

Daquan Li

Keyword(s):

Composite Materials ◽

Powder Metallurgy ◽

Friction Coefficient ◽

Tribological Properties ◽

Utilization Rate ◽

Powder Metallurgy Technique ◽

Aluminum Composite ◽

Powder Metallurgy Process ◽

Metallurgy Process ◽

Composite Samples

In order to make full use of the wear resistance and antifriction of the mixed reinforced particles, improve the performance and utilization rate of the composite material, and reduce its wear amount, in this study, graphite and aluminum composite materials with different graphite concentration were prepared by powder metallurgy process. On this basis, the influence of different graphite concentration on the friction coefficient and wear amount of composite samples and different load on the wear amount of composite materials were discussed and analyzed. The results show that with the increase of graphite content, the friction coefficient and wear amount of the composite will decrease correspondingly. When the load is less than 30 N, the wear curve of the sample changes steadily. When the load is more than 30 N, the wear will increase sharply. Therefore, the analysis of the tribological properties of the graphite and aluminum composites based on the powder metallurgy process plays an important role in improving the utilization rate of the composite and reducing its wear.

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Influence of reinforcing fiber on the dry sliding wear behavior of hybrid fabric/benzoxazine composites

Textile Research Journal ◽

10.1177/0040517519849447 ◽

2019 ◽

Vol 89 (23-24) ◽

pp. 5153-5164

Author(s):

Meng Su ◽

Lei Liang ◽

Fang Ren ◽

Weigang Yao ◽

Mingming Yu ◽

...

Keyword(s):

High Temperatures ◽

Tribological Properties ◽

Sliding Wear ◽

Wear Behavior ◽

Wear Test ◽

Mechanical Analysis ◽

Dry Sliding Wear ◽

Fabric Composite ◽

Fabric Composites ◽

Wear Tests

Hybrid polyimide (PI)-polytetrafluoroethylene (PTFE)/Nomex fabric composites and Nomex-PTFE/Nomex fabric composites were prepared with benzoxazine (BOZ) as the resin binder. The tribological properties and wear mechanisms of the two composites at different temperatures were investigated using a ball-on-disk wear tester. Before sliding wear tests, a thermo-aging test, thermogravimetric analysis and dynamic mechanical analysis of PI and Nomex fibers were performed to evaluate the thermal properties of the two reinforcing fibers. After each wear test, scanning electron microscopy was employed to analyze the morphologies of the worn surfaces of the composite. The results of sliding wear tests show that the difference between the tribological properties of the two composites is small at room temperature. However, the hybrid PI-PTFE/Nomex fabric composite achieves better tribological properties at high temperatures compared with the hybrid Nomex-PTFE/Nomex fabric composite, which suffered wear failure at 240℃. It is proposed that the excellent thermal mechanical property and thermal stability of PI fibers is the main factor that endows the PI-PTFE/Nomex/BOZ composite with a more favorable tribological property at high temperatures. Moreover, the influence of the increasing temperature on the tribological properties of the two composites was also investigated.

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