Development of matrix microstructure in polycrystalline cubic boron nitride ceramics
Artikel i vetenskaplig tidskrift, 2017

The development of matrix microstructure in polycrystalline cubic boron nitride cutting tool materials has been investigated by X-ray diffraction and scanning and transmission electron microscopy combined with energy dispersive X-ray spectrometry. The materials had a matrix based on Ti(C,O,N) and Al and were fabricated from powder mixtures milled with either WC-Co cemented carbide or (Ti,W)(C,N)-Co cermet milling media. The introduction of WC-Co debris resulted in the formation of an Al- and W-rich liquid phase during high pressure high temperature sintering. Crystalline intergranular phases rich in W partitioned from this liquid. Debris from the cermet milling media resulted in the formation of intergranular Co2B; the W was retained in the (Ti,W)(C,N) structure during sintering. Al-rich reaction zones on cBN grain surfaces developed locally during high pressure high temperature sintering. © 2017 Elsevier Ltd

WC-Co cemented carbide milling media

Cermet milling media

Microstructure

PCBN

Titanium oxide nitride carbide

Författare

Kristina Lindgren

Chalmers, Fysik, Biologisk fysik

A. Kauppi

Sandvik

Lena Falk

Chalmers, Fysik, Biologisk fysik

Journal of the European Ceramic Society

0955-2219 (ISSN)

Vol. 37 3017-3026

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialkemi

Metallurgi och metalliska material

Styrkeområden

Materialvetenskap

DOI

10.1016/j.jeurceramsoc.2017.03.010