Wear behaviour of interpenetrating alumina–copper composites

Winzer, Jami; Weiler, Ludwig; Pouquet, Jeanne; Rödel, Jürgen

doi:10.1016/j.wear.2011.05.042

Cited by 32 publications

(23 citation statements)

References 30 publications

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“…Yet, combining the two phases in a composite material has clear technological potential [6][7][8][9]: copper is an excellent heat and electricity conductor, in which Al 2 O 3 particles offer improved hardness and wear resistance without introducing atomscale electron scattering centers. The Cu-Al 2 O 3 system is non-reactive in high-vacuum or in oxygen-lean inert gas [4]; as a consequence Al 2 O 3 should not be degraded during processing.…”

Section: Introductionmentioning

confidence: 99%

Al2O3 particle rounding in molten copper and Cu8wt%Al

Krüger

Mortensen

2012

J Mater Sci

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We investigate processing-microstructure relationships in the production of Al 2 O 3 particle reinforced copper composites by solidification processing. We show that during production of the composites by gas-pressure infiltration of packed Al 2 O 3 particle preforms with liquid Cu or with liquid Cu8wt%Al at either 1,150 or 1,300°C, capillarity-driven transport of alumina can cause rounding of the Al 2 O 3 particles. We use quantitative metallography to show that the extent of particle rounding increases markedly with temperature and with the initial aluminum concentration in the melt. An analysis of the thermodynamics and kinetics governing the transport of alumina in contact with molten copper, considering both interfacial and volume diffusion, leads to propose two mechanisms for the rounding effect, namely (i) variations in the equilibrium concentration of oxygen in the melt as affected by the initial aluminum concentration, or (ii) segregation of aluminum to the interface with the ceramic.

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Section: Introductionmentioning

confidence: 99%

Al2O3 particle rounding in molten copper and Cu8wt%Al

Krüger

Mortensen

2012

J Mater Sci

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“…Figure 11(e) reveals specific details of composite surface with 6 wt% marble dust reinforced composite where the removal of matrix as well as filler material was seen. The reason behind this may be poor bonding strength between filler and matrix alloy [37]. Moreover, here the segregation or improper distribution of filler material that result in large amount of void content (see table 4) and lower hardness may be the possible reason for material removal.…”

Section: Surface Morphologymentioning

confidence: 99%

Mechanical and tribological properties of composite made of marble dust-reinforced C93200 copper alloy

Rajak

Aherwar

Pruncu

2020

Mater. Res. Express

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Composite materials are unique because reveal great physical, mechanical and thermal properties. However, there is yet huge potential to enhance their features by adding specific reinforcement in the matrix in order to reach the requirements of a particular application. This paper presents detailed research on the impact of marble dust reinforcement to mechanical and tribological features of copper based metal alloy (C93200 series) composites dedicated for bearing applications. The novel composites made with marble dust reinforcement (1.5 to 6.0 wt%) were manufactured using the liquid metal stir casting technique. A micro-hardness tester and universal testing machine (Instron-5967) were used to obtain the mechanical properties. While, the POD tribometer was engaged to detect the wear features by simulating various operating conditions by setting the temperature constant (35°C). The Scanning Electron Microscope (SEM) was used to investigate the wear mechanisms produced at the hard contact between the composites with different marble content against an EN-31 hardened steel disc. The data gathered in this research proves an improvement in the mechanical properties, especially for a higher reinforcement ratio of novel composite, in respect to the matrix alloy. Furthermore, the novel marble dust reinforced composites reveal much better wear resistance in respect to un-reinforced composite that make it suitable for bearing application.

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“…Pure or alloyed copper has thus been combined with ceramics as diverse as TiB 2 [1][2][3][4][5][6][7], Al 2 O 3 [1,[8][9][10][11], several forms of carbon [12][13][14][15][16] or various carbides [17][18][19][20][21]; Ref. [22] gives a review of their processing methods and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%