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Mechanical properties of cBN–Al composite materials

McKie, Amanda and Winzer, Jami and Sigalas, Iakovos and Herrmann, Mathias and Weiler, Ludwig and Rödel, Jürgen and Can, Nedret (2011):
Mechanical properties of cBN–Al composite materials.
In: Ceramics International, pp. 1-8, 37, (1), ISSN 02728842,
[Online-Edition: http://dx.doi.org/10.1016/j.ceramint.2010.07.034],
[Article]

Abstract

The relationship between microstructure and mechanical properties for a wide range of composite materials based on polycrystalline cubic boron nitride and aluminium as a binder phase (PcBN–Al) has been examined. The PcBN–Al composites were made using high-pressure, high-temperature (HPHT) sintering methods, yielding materials with grain sizes of cBN between 2 and 20 μm and an initial amount of Al binder between 15 and 25 vol.%. Hardness ranged between 15 and 40 GPa, while fracture toughness and strength were between 6.4–8.0 MPa m1/2 and 355–454 MPa, respectively. Fractography was employed to investigate the large scatter in fracture strengths and correlate fracture strength with fracture toughness through the size of the fracture origins.

Item Type: Article
Erschienen: 2011
Creators: McKie, Amanda and Winzer, Jami and Sigalas, Iakovos and Herrmann, Mathias and Weiler, Ludwig and Rödel, Jürgen and Can, Nedret
Title: Mechanical properties of cBN–Al composite materials
Language: English
Abstract:

The relationship between microstructure and mechanical properties for a wide range of composite materials based on polycrystalline cubic boron nitride and aluminium as a binder phase (PcBN–Al) has been examined. The PcBN–Al composites were made using high-pressure, high-temperature (HPHT) sintering methods, yielding materials with grain sizes of cBN between 2 and 20 μm and an initial amount of Al binder between 15 and 25 vol.%. Hardness ranged between 15 and 40 GPa, while fracture toughness and strength were between 6.4–8.0 MPa m1/2 and 355–454 MPa, respectively. Fractography was employed to investigate the large scatter in fracture strengths and correlate fracture strength with fracture toughness through the size of the fracture origins.

Journal or Publication Title: Ceramics International
Volume: 37
Number: 1
Uncontrolled Keywords: Mechanical properties; Hardness; Polycrystalline cubic boron nitride (cBN); Fracture toughness; Bending strength
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1016/j.ceramint.2010.07.034
Identification Number: doi:10.1016/j.ceramint.2010.07.034
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