Publication result detail

Influence of Metallic Dopants on Fracture Behaviour of TiB2 Based Cermets

CHLUP, Z.; BACA, L.; HALASOVÁ, M.; ŠAJGALÍK, P.

Original Title

Influence of Metallic Dopants on Fracture Behaviour of TiB2 Based Cermets

English Title

Influence of Metallic Dopants on Fracture Behaviour of TiB2 Based Cermets

Type

Paper in proceedings (conference paper)

Original Abstract

Titanium diboride (TiB2) - metal composites were prepared by hot-pressing of the TiB2 - Ni and Ta doped TiB2-Ni powders. The obvious limitation of pure TiB2 is the bad sinterability, exaggerated grain growth at temperatures exceeded 2000 C needed for the densification and brittleness. There is only limited number of approaches how to improve fracture resistance. The method used in this work is based on doping the basic microstructure by above mentioned metals. The positive influence of dopants on the microstructure and fracture behaviour was demonstrated by means of mechanical properties and fractographic analysis. The right selection of dopants led to the refinement of microstructure resulted in the increase of flexural strength up to the level of 700 MPa and fracture toughness of 5.0 MPa.m1/2.

English abstract

Titanium diboride (TiB2) - metal composites were prepared by hot-pressing of the TiB2 - Ni and Ta doped TiB2-Ni powders. The obvious limitation of pure TiB2 is the bad sinterability, exaggerated grain growth at temperatures exceeded 2000 C needed for the densification and brittleness. There is only limited number of approaches how to improve fracture resistance. The method used in this work is based on doping the basic microstructure by above mentioned metals. The positive influence of dopants on the microstructure and fracture behaviour was demonstrated by means of mechanical properties and fractographic analysis. The right selection of dopants led to the refinement of microstructure resulted in the increase of flexural strength up to the level of 700 MPa and fracture toughness of 5.0 MPa.m1/2.

Keywords

hot pressing, mechanical alloying, mechanical milling, bending test, toughness, cermets

Key words in English

hot pressing, mechanical alloying, mechanical milling, bending test, toughness, cermets

Authors

CHLUP, Z.; BACA, L.; HALASOVÁ, M.; ŠAJGALÍK, P.

RIV year

2016

Released

21.10.2012

Book

Acta Metallurgica Slovaca

ISBN

1335-1532

Periodical

Acta Metallurgica Slovaca

State

Slovak Republic

Pages from

98

Pages to

105

Pages count

8

BibTex

@inproceedings{BUT101123,
  author="Zdeněk {Chlup} and Ľuboš {Bača} and Martina {Halasová} and Pavol {Šajgalík}",
  title="Influence of Metallic Dopants on Fracture Behaviour of TiB2 Based Cermets",
  booktitle="Acta Metallurgica Slovaca",
  year="2012",
  journal="Acta Metallurgica Slovaca",
  number="3",
  pages="98--105",
  issn="1335-1532"
}