Obiekt

Tytuł odmienny:

Badania spieków wykonanych z zastosowaniem proszków miedzi pokrytej strukturą węglową zawierającą grafen ; Badania spieków wykonanych z zastosowaniem proszków miedzi pokrytej strukturą węglową zawierającą grafen

Współtwórca:

Tomasz MAJEWSKI ; Tomasz MAJEWSKI

Abstrakt:

This paper presents the results of preliminary tests on specimens made from mixtures of dendritic copper powder (CuE) with the graphene-coated copper powder (CuG) in a range from 20% to 100% (CuG). The properties of the powder mixtures, green compacts and sinters were determined. In order to study the properties of the powder mixtures, the following tests were carried out: a measurement of the CuG powder grain size after the grinding process, measurements of the bulk density and tap density of the prepared powder mixtures. The porosity of the produced green compacts and the sinters was calculated as well as the densification capabilities of the powder mixtures by use die pressing, cold isostatic pressing and sintering in a reducing atmosphere were tested. Moreover, the morphology of the existing pores was analysed using an optical microscope and the Brinell hardness was determined. The measured Brinell hardness of the samples was in the range of 17 HB for sinters made from CuG to 34 HB for sinters made from a 20% CuG powder mixture. More than six hundred measurements that were made in this study show that the high CuG content in the powder mixture reduces the hardness of the sinters as well as increase their porosity.
; This paper presents the results of preliminary tests on specimens made from mixtures of dendritic copper powder (CuE) with the graphene-coated copper powder (CuG) in a range from 20% to 100% (CuG). The properties of the powder mixtures, green compacts and sinters were determined. In order to study the properties of the powder mixtures, the following tests were carried out: a measurement of the CuG powder grain size after the grinding process, measurements of the bulk density and tap density of the prepared powder mixtures. The porosity of the produced green compacts and the sinters was calculated as well as the densification capabilities of the powder mixtures by use die pressing, cold isostatic pressing and sintering in a reducing atmosphere were tested. Moreover, the morphology of the existing pores was analysed using an optical microscope and the Brinell hardness was determined. The measured Brinell hardness of the samples was in the range of 17 HB for sinters made from CuG to 34 HB for sinters made from a 20% CuG powder mixture. More than six hundred measurements that were made in this study show that the high CuG content in the powder mixture reduces the hardness of the sinters as well as increase their porosity.

Miejsce wydania:

Warszawa
; Warszawa

Wydawca:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Data utworzenia:

2010 r.0

Data złożenia:

2020-09-15 ; 2020-09-15

Data akceptacji:

2020-10-15 ; 2020-10-15

Data wydania:

2021-06-30 ; 2021-06-30

Rozmiar:

B5 ; B5

Identyfikator:

oai:ribes-88.man.poznan.pl:2613

Sygnatura:

DOI 10.5604/01.3001.0014.9339 ; DOI 10.5604/01.3001.0014.9339

ISSN elektroniczny:

2720-5266 ; 2720-5266

ISSN drukowany:

2081-5891 ; 2081-5891

Język:

angielski ; angielski

Właściciel praw:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Strona początkowa:

75 ; 75

Strona końcowa:

90 ; 90

Tom:

12 ; 12

Słowa kluczowe:

mechanical engineering, material engineering, powder metallurgy, sintered copper, graphene ; mechanical engineering, material engineering, powder metallurgy, sintered copper, graphene