Interface modification of SiC-fibre/copper matrix composites by applying a titanium interlayer

Brendel, A.; Popescu, C.; Schurmann, Hartmut; Bolt, H.

doi:10.1016/j.surfcoat.2005.02.018

Cited by 34 publications

(26 citation statements)

References 12 publications

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“…17, 18 Fibre push-out experiments show an interfacial shear strength value of 60 MPa for SiC f -Cu. In scanning electron micrographs the plastic deformation of the Cu matrix after a push-out test is clearly visible, figure 4.…”

Section: Materials Issues For Plasma-facing Componentsmentioning

confidence: 99%

Materials for the plasma-facing components of fusion reactors

Bolt¹,

Barabash²,

Krauß³

et al. 2004

Journal of Nuclear Materials

566

251

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According to current knowledge and understanding, nuclear fusion can be developed to a sustainable energy technology. Fuel is abundant and key points as fusion power production and alpha particle heating have already been demonstrated. The next-step device ITER (International Thermonuclear Experimental Reactor) is designed to demonstrate net power production and to address most of the technological issues on the way to a power reactor. There is, however, a

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Section: Materials Issues For Plasma-facing Componentsmentioning

confidence: 99%

Materials for the plasma-facing components of fusion reactors

Bolt¹,

Barabash²,

Krauß³

et al. 2004

Journal of Nuclear Materials

566

251

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“…Arithmetic means of three different measurements for each sample were obtained. The measured width and depth of wear scar values are used to compute the volume by means of the following equation [6]:…”

Section: Hardness and Wear Resultsmentioning

confidence: 99%

“…These limitations are often circumvented by dispersing a stronger ceramic material in the copper matrix. In the literature, Al 2 O 3 [2,3], NbC [4], Fe 3 C [5], SiC [6], diamond [7][8][9] have commonly been used as reinforcements for Cu matrix. Among these, nanodiamond particles are quite attractive due to their unique mechanical and tribological properties, including extreme hardness and inertness to chemical attack [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and wear characterizations of Ultra-Dispersed Diamond (UDD) reinforced Cu-15 wt.% Ti composites fabricated via mechanical alloying and sintering

Kaftelen¹,

Öveçoğlu²

2017

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In this study, effects of ultra-dispersed nanodiamond content on the microstructure and wear properties of Cu-15 wt.% Ti matrix composite were investigated. Samples were prepared by mechanical alloying and sintering at 890• C for 2 h under H2 gas atmosphere. Microstructural changes and dry sliding wear characterizations of sintered samples were investigated by a field emission scanning electron microscope (FESEM), and their phase characteristics were carried out using X-ray diffractometer (XRD). Electron microscopy investigations revealed that a good bonding between nanodiamond particles and Cu matrix could not be maintained due to the formation of free copper layers and the presence of high oxygen amount at the interface. The results taken from worn surfaces showed that high content of nanodiamond (10 wt.%) with oxide particles led to low wear resistance due to poor bonding between Cu-15 wt.% Ti matrix and nanodiamond particles which were pulled out during dry sliding wear.K e y w o r d s : ultra-dispersed nanodiamond powders, microstructure, wear resistance

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“…1). formed with the copper matrix [6], [7]. This leads to the very high bond strength between fibre and matrix.…”

Section: Discussionmentioning

confidence: 99%

“…A suitable choice is a thin titanium interlayer (100 nm) [5]. Ti reacts with the carbon layer of the SCS6 fibre to TiC [6] and forms the Cu 4 Ti alloy with the copper matrix [7]. Both reactions lead to chemical and mechanical bonding between SCS6 fibre and copper.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of SiC long fibre reinforced copper

Brendel

Paffenholz

Köck

et al. 2009

Journal of Nuclear Materials

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SiC fibre reinforced copper is a potential novel heat sink material for the divertor of future fusion reactors to reinforce the zone between plasma facing material (W) and heat sink material (CuCrZr). The metal matrix composite (MMC) should be able to withstand heat loads up to 15 MW/m² at operating temperatures of up to 550°C. SCS6 fibres were coated by magnetron sputtering with a titanium interlayer and the copper matrix was deposited by electroplating. The composite was consolidated by hotisostatic pressing. The average ultimate tensile strength of composite samples with 20 % fibre reinforcement is 640 MPa and for the Young's modulus 162 GPa was determined.The Young's modulus decreases with increasing temperature and reaches 113 GPa at 550°C.Fracture area analysis after tensile tests show the failure of the SCS 6 fibres at the interface between the two outer carbon layers. Titanium as interlayer led to an improved bonding between the outer carbon coating of the SiC fibres and the copper matrix. IntroductionSiC fibre reinforced copper is a potential novel heat sink material for the divertor of future ExperimentalSCS6 fibres (Specialty Materials) were coated by magnetron sputtering with a 100 nm titanium interlayer for improved bonding and a 500-nm-thin copper layer without breaking the vacuum to protect the titanium layer against oxygen. In a next step the pure copper matrix was deposited by electroplating. In a CuSO 4 bath a 50-µm-thick Cu layer was grown on the fibres within 4 hours, resulting in a fibre volume fraction of 35 %.Uncoated and coated fibres were used for single fibre tensile tests at room temperature with a laser speckle extensometer for contact less strain measurements.Heat treatment of coated single fibres at 550°C in vacuum with a very slow heating rate (0.5 Kmin -1 ) served to reduce pores in the copper by outgassing of hydrogen. 4After heat treatment the coated single fibres for the composite were etched with an acid agent to remove surface oxide layers and subsequently packed in a Cu capsule (length 45 mm, diameter 8 mm), which was vacuum-sealed. The fibre reinforced zone had a diameter of 3.5 mm. The composite was consolidated by hot-isostatic pressing (HIP) of these capsules at 650°C and 100 MPa for 30 min. Tensile test specimens were machined out of the composite capsules. The overall sample length was 44 mm with a parallel gauge length of 12 mm (Fig. 1). The diameter within the parallel gauge length varied between 3.5 mm and 4.5 mm in order to obtain fibre volume fractions in the range of 10% to 20%. The threaded specimen ends were clamped by means of a hydraulic chuck.The clamp construction allowed to compensate for the temperature induced relaxation process in the copper threads and hence kept the clamping force at a sufficient level.The composite was tensile tested with a constant displacement rate of 1 mm/min. For high temperature tests the samples were inductively heated. A predominantly indirect heating characteristic was achieved by the combination of specimen, grips a...

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Interface modification of SiC-fibre/copper matrix composites by applying a titanium interlayer

Cited by 34 publications

References 12 publications

Materials for the plasma-facing components of fusion reactors

Materials for the plasma-facing components of fusion reactors

Microstructural and wear characterizations of Ultra-Dispersed Diamond (UDD) reinforced Cu-15 wt.% Ti composites fabricated via mechanical alloying and sintering

Mechanical properties of SiC long fibre reinforced copper

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