Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

Anna Bańkowska

Institute of Electronic Materials Technology (PL)

Ostatnie publikacje
1.  Pietrzak K., Frydman K., Wójcik-Grzybek D., Gładki A., Bańkowska A., Borkowski P., Effect of carbon forms on properties of Ag-C composites contact materials, MATERIALS SCIENCE, ISSN: 1068-820X, DOI: 10.5755/j01.ms.24.1.17769, Vol.24, No.1, pp.69-74, 2018

Streszczenie:
This paper presents the manufacturing method of silver based composite materials containing 3 % vol. carbon forms (nanotubes and graphene). The most significant challenge was to obtain good dispersion of carbon in the metallic matrix. The applying of suitable dispersants allows to get uniform distribution of carbon reinforcement. Triton X-100 and ultrasonic support were used in the powder mixing process. Ag-nanotubes and Ag-graphene contact tips were made using Spark Plasma Sintering process (SPS). The results of research into both physical and electrical properties of these composites are presented. It has been demonstrated that the form of introduced carbon exerts influence on the electrical characteristics of contacts, and particularly on arc erosion. Performed electrical test indicated that Ag-nanotubes contacts showed higher resistance to arc erosion than Ag-graphene contacts. It can be explained by the better dispersion to individual carbon nanotubes their lower than for graphene edge defects density and due to this higher thermal and electrical conductivity.

Słowa kluczowe:
composite materials, silver-nanotubes, silver-graphene, arc erosion, contact resistance

Afiliacje autorów:
Pietrzak K. - inna afiliacja
Frydman K. - Institute of Electronic Materials Technology (PL)
Wójcik-Grzybek D. - Institute of Electronic Materials Technology (PL)
Gładki A. - Institute of Electronic Materials Technology (PL)
Bańkowska A. - Institute of Electronic Materials Technology (PL)
Borkowski P. - Lodz University of Technology (PL)
15p.
2.  Pietrzak K., Strojny-Nędza A., Olesińska W., Bańkowska A., Gładki A., Cu-rGO subsurface layer creation on copper substrate and its resistance to oxidation, APPLIED SURFACE SCIENCE, ISSN: 0169-4332, DOI: 10.1016/j.apsusc.2016.11.155, Vol.421, pp.228-233, 2017

Streszczenie:
On the basis of a specially designed experiment, this paper presents a model, which is an attempt to explain the mechanism of formatting and creating oxidation resistance of Cu-rGO subsurface layers. Practically zero chemical affinity of copper to carbon is a fundamental difficulty in creating composite structures of Cu-C, properties which are theoretically possible to estimate. In order to bind the thermally reduced graphene oxide with copper surface, the effect of structural rebuilding of the copper oxide, in the process of annealing in a nitrogen atmosphere, have been used. On intentionally oxidized and anoxic copper substrates the dispersed graphene oxide (GO) and thermally reduced graphene oxide (rGO) were loaded. Annealing processes after the binding effects of both graphene oxide forms to Cu substrates were tested. The methods for high-resolution electron microscopy were found subsurface rGO-Cu layer having a substantially greater resistance to oxidation than pure copper. The mechanism for the effective resistance to oxidation of the Cu-rGO has been presented in a hypothetical form

Słowa kluczowe:
Metal matrix composite, Copper, Graphene, Oxidation

Afiliacje autorów:
Pietrzak K. - inna afiliacja
Strojny-Nędza A. - Institute of Electronic Materials Technology (PL)
Olesińska W. - Institute of Electronic Materials Technology (PL)
Bańkowska A. - Institute of Electronic Materials Technology (PL)
Gładki A. - Institute of Electronic Materials Technology (PL)
35p.

Kategoria A Plus

IPPT PAN

logo ippt            ul. Pawińskiego 5B, 02-106 Warszawa
  +48 22 826 12 81 (centrala)
  +48 22 826 98 15
 

Znajdź nas

mapka
© Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk 2024