Improvement of Electrical Insulating and Anti-Wear Properties of Composites Used in Telemetry Systems

2015 ◽  
Vol 792 ◽  
pp. 578-581
Author(s):  
A.R. Gallyamov ◽  
I.D. Ibatullin ◽  
A.Y. Murzin
Keyword(s):  
Composite Materials ◽  
Epoxide Resin ◽  
Wear Properties ◽  
Research Results ◽  
Tribotechnical Properties ◽  
Properties Of Composites

This article deals with the research results of electroinsulated and tribotechnical properties of composite materials on the basis of epoxide resin. The effect of fillers — micro-and nanopowders of various materials - on the properties of composites is examined. The use of composites in the manufacture of separators for telemetry systems is demonstrated.

A Method to Evaluate the Elastic Properties of Ceramics-Enhanced Composites Undertaking Interfacial Delamination

2007 ◽  
Vol 336-338 ◽  
pp. 2513-2516
Author(s):  
Hua Jian Chang ◽  
Shu Wen Zhan
Keyword(s):  
Composite Materials ◽  
Present Method ◽  
Present Model ◽  
Constitutive Law ◽  
Layer Model ◽  
Interfacial Delamination ◽  
Equivalent Inclusion Method ◽  
Equivalent Inclusion ◽  
Micromechanical Approach ◽  
Properties Of Composites

A micromechanical approach is developed to investigate the behavior of composite materials, which undergo interfacial delamination. The main objective of this approach is to build a bridge between the intricate theories and the engineering applications. On the basis of the spring-layer model, which is useful to treat the interfacial debonding and sliding, the present paper proposes a convenient method to assess the effects of delamination on the overall properties of composites. By applying the Equivalent Inclusion Method (EIM), two fundamental tensors are derived in the present model, the modified Eshelby tensor, and the compliance tensor (or stiffness tensor) of the weakened inclusions. Both of them are the fundamental tensors for constructing the overall constitutive law of composite materials. By simply substituting these tensors into an existing constitutive model, for instance, the Mori-Tanaka model, one can easily evaluate the effects of interfacial delamination on the overall properties of composite materials. Therefore, the present method offers a pretty convenient tool. Some numerical results are carried out in order to demonstrate the performance of this model.

Influence of the particle size on the physical, mechanical and tribological properties of composites for brake pads

2021 ◽  
pp. 36-40
Author(s):  
F.F. Yusubov
Keyword(s):  
Particle Size ◽  
Composite Materials ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Phenol Formaldehyde ◽  
Environmentally Friendly ◽  
Brake Pads ◽  
Mechanical And Tribological Properties ◽  
Pin On Disk ◽  
Properties Of Composites

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]

Influence of the range of grinding thermo-expanded graphite on physical-mechanical and tribotechnical properties of composite materials produced on its basis

2018 ◽  
Vol 5 (12) ◽  
pp. 26113-26118
Author(s):  
Elena Matygullina ◽  
Dmitrii Karavaev ◽  
Lyudmila Sirotenko ◽  
Almaz Khanov ◽  
Oleg Isaev
Keyword(s):  
Composite Materials ◽  
Expanded Graphite ◽  
Tribotechnical Properties

scholarly journals Fabrication and Tribological Properties of Copper Matrix Solid Self-Lubricant Composites Reinforced with Ni/NbSe2 Composites

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1854
Author(s):  
Fei-xia Zhang ◽  
Yan-qiu Chu ◽  
Chang-sheng Li
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Copper Matrix ◽  
Wear Properties ◽  
Disk Friction ◽  
Friction Reducing ◽  
Properties Of Composites

This paper presents a facile and effective method for preparing Ni/NbSe2 composites in order to improve the wettability of NbSe2 and copper matrix, which is helpful in enhancing the friction-reducing and anti-wear properties of copper-based composites. The powder metallurgy (P/M) technique was used to fabricate copper-based composites with different weight fractions of Ni/NbSe2, and tribological properties of composites were evaluated by using a ball-on-disk friction-and-wear tester. Results indicated that tribological properties of copper-based composites were improved by the addition of Ni/NbSe2. In particular, copper-based composites containing 15 wt.% Ni/NbSe2 showed the lowest friction coefficient (0.16) and wear rate (4.1 × 10−5 mm3·N−1·m−1) among all composites.

Surfactant Influence on the Tribological Properties of Bentonite-Based Greases

2005 ◽  
Author(s):  
A. K. Pogosian ◽  
T. R. Martirosyan
Keyword(s):  
Tribological Properties ◽  
High Pressures ◽  
Nano Particles ◽  
Ammonium Salts ◽  
Quaternary Amine ◽  
Wear Properties ◽  
Natural Minerals ◽  
New Type ◽  
Plastic Lubricants ◽  
Properties Of Composites

Development of new type plastic lubricants capable of sustaining high pressures is thus important by using natural minerals. The effect of surfactant ration and structure of thickener nano-particles surfaces on the tribological properties of bentonite-based greases was studied. The best anti-friction and anti-wear properties of plastic lubricants were revealed at the particles modified by quaternary amine and urotropine type ammonium salts, and the necessary ratio for the bentonite particles surface modification by quarterly ammonium salts was revealed, which provide the best tribological properties of composites.

Wear properties of natural fibre composite materials

2019 ◽  
Author(s):  
P. C. Abhemanyu ◽  
E. Prassanth ◽  
T. Navin Kumar ◽  
R. Vidhyasagar ◽  
K. Prakash Marimuthu
Keyword(s):  
Composite Materials ◽  
Fibre Composite ◽  
Natural Fibre ◽  
Wear Properties ◽  
Natural Fibre Composite
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