Metastable phases in the Co-W system traced from elemental Co and W powders

A. S. Bolokang, M. J. Phasha, D. E. Motaung, S. Bhero

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

X-ray diffraction technique was used to identify the phases of the milled and annealed elemental Co, W and Co-W powder mixture. Structural similarities in metastable phases of elemental Co and W have been obtained. The η-phase with 11.037 Å was detected in both milled and annealed W as well as in the Co-W alloy. In addition, metastable FCC Co (W) solid solution of 3.544 Å was detected. Upon annealing a 30 h milled Co powder compact at 800 °C, two metastable FCC phases with lattice parameters of 3.506 Å and 4.162 Å were obtained. For milled, annealed and water-quenched W at 1000 °C, metastable FCC phases with a = 3.510 Å and 4.177 Å were obtained. Furthermore, metastable HCP phase with a = 2.731 Å; c = 4.319 Å was detected after annealing of milled W at 1000 °C.

Original languageEnglish
Pages (from-to)274-280
Number of pages7
JournalInternational Journal of Refractory Metals and Hard Materials
Volume31
DOIs
Publication statusPublished - Mar 1 2012

Fingerprint

Metastable phases
Powders
Annealing
Lattice constants
Solid solutions
X ray diffraction
Water

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

@article{9ea1737e73fd480d9593d54c3c67c413,
title = "Metastable phases in the Co-W system traced from elemental Co and W powders",
abstract = "X-ray diffraction technique was used to identify the phases of the milled and annealed elemental Co, W and Co-W powder mixture. Structural similarities in metastable phases of elemental Co and W have been obtained. The η-phase with 11.037 {\AA} was detected in both milled and annealed W as well as in the Co-W alloy. In addition, metastable FCC Co (W) solid solution of 3.544 {\AA} was detected. Upon annealing a 30 h milled Co powder compact at 800 °C, two metastable FCC phases with lattice parameters of 3.506 {\AA} and 4.162 {\AA} were obtained. For milled, annealed and water-quenched W at 1000 °C, metastable FCC phases with a = 3.510 {\AA} and 4.177 {\AA} were obtained. Furthermore, metastable HCP phase with a = 2.731 {\AA}; c = 4.319 {\AA} was detected after annealing of milled W at 1000 °C.",
author = "Bolokang, {A. S.} and Phasha, {M. J.} and Motaung, {D. E.} and S. Bhero",
year = "2012",
month = "3",
day = "1",
doi = "10.1016/j.ijrmhm.2011.12.012",
language = "English",
volume = "31",
pages = "274--280",
journal = "International Journal of Refractory Metals and Hard Materials",
issn = "0958-0611",
publisher = "Elsevier BV",

}

Metastable phases in the Co-W system traced from elemental Co and W powders. / Bolokang, A. S.; Phasha, M. J.; Motaung, D. E.; Bhero, S.

In: International Journal of Refractory Metals and Hard Materials, Vol. 31, 01.03.2012, p. 274-280.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Metastable phases in the Co-W system traced from elemental Co and W powders

AU - Bolokang, A. S.

AU - Phasha, M. J.

AU - Motaung, D. E.

AU - Bhero, S.

PY - 2012/3/1

Y1 - 2012/3/1

N2 - X-ray diffraction technique was used to identify the phases of the milled and annealed elemental Co, W and Co-W powder mixture. Structural similarities in metastable phases of elemental Co and W have been obtained. The η-phase with 11.037 Å was detected in both milled and annealed W as well as in the Co-W alloy. In addition, metastable FCC Co (W) solid solution of 3.544 Å was detected. Upon annealing a 30 h milled Co powder compact at 800 °C, two metastable FCC phases with lattice parameters of 3.506 Å and 4.162 Å were obtained. For milled, annealed and water-quenched W at 1000 °C, metastable FCC phases with a = 3.510 Å and 4.177 Å were obtained. Furthermore, metastable HCP phase with a = 2.731 Å; c = 4.319 Å was detected after annealing of milled W at 1000 °C.

AB - X-ray diffraction technique was used to identify the phases of the milled and annealed elemental Co, W and Co-W powder mixture. Structural similarities in metastable phases of elemental Co and W have been obtained. The η-phase with 11.037 Å was detected in both milled and annealed W as well as in the Co-W alloy. In addition, metastable FCC Co (W) solid solution of 3.544 Å was detected. Upon annealing a 30 h milled Co powder compact at 800 °C, two metastable FCC phases with lattice parameters of 3.506 Å and 4.162 Å were obtained. For milled, annealed and water-quenched W at 1000 °C, metastable FCC phases with a = 3.510 Å and 4.177 Å were obtained. Furthermore, metastable HCP phase with a = 2.731 Å; c = 4.319 Å was detected after annealing of milled W at 1000 °C.

UR - http://www.scopus.com/inward/record.url?scp=84856407800&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856407800&partnerID=8YFLogxK

U2 - 10.1016/j.ijrmhm.2011.12.012

DO - 10.1016/j.ijrmhm.2011.12.012

M3 - Article

AN - SCOPUS:84856407800

VL - 31

SP - 274

EP - 280

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

SN - 0958-0611

ER -