Formation and alloying of nanostructured β-W powders

N. C. Angastiniotis; B. H. Kear; L. E. McCandlish; K. V. Ramanujachary; M. Greenblatt

doi:10.1016/0965-9773(92)90036-W

Formation and alloying of nanostructured β-W powders

N. C. Angastiniotis
, B. H. Kear
, L. E. McCandlish
, K. V. Ramanujachary
, M. Greenblatt

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We have been investigating the reductive decomposition of spray dried ammonium metatungstate (AMT). Reduction of the pyrolysed powder in flowing hydrogen at T ≥ 625° C creates α-W, with bcc structure. Reduction at T ≤ 575° C results in the formation of W₃O, with A15 structure. In situ reduction experiments carried out in a controled atmosphere, high temperature X-ray powder diffractometer have shown that W₃O transforms to β-W, in which most of the oxygen atoms are absent. Various experiments confirming the existence of WO_1-x are described. Initial experiments on its alloying behavior with nitrogen are also discussed.

Original language	English (US)
Pages (from-to)	293-302
Number of pages	10
Journal	Nanostructured Materials
Volume	1
Issue number	4
DOIs	https://doi.org/10.1016/0965-9773(92)90036-W
State	Published - 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics

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10.1016/0965-9773(92)90036-W

Cite this

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title = "Formation and alloying of nanostructured β-W powders",

abstract = "We have been investigating the reductive decomposition of spray dried ammonium metatungstate (AMT). Reduction of the pyrolysed powder in flowing hydrogen at T ≥ 625° C creates α-W, with bcc structure. Reduction at T ≤ 575° C results in the formation of W3O, with A15 structure. In situ reduction experiments carried out in a controled atmosphere, high temperature X-ray powder diffractometer have shown that W3O transforms to β-W, in which most of the oxygen atoms are absent. Various experiments confirming the existence of WO1-x are described. Initial experiments on its alloying behavior with nitrogen are also discussed.",

author = "Angastiniotis, \{N. C.\} and Kear, \{B. H.\} and McCandlish, \{L. E.\} and Ramanujachary, \{K. V.\} and M. Greenblatt",

note = "Funding Information: This work was suppofiedbythe Office of Naval Research undercon\textasciitilde{}act\#N00014-91-J-1828.",

year = "1992",

doi = "10.1016/0965-9773(92)90036-W",

language = "English (US)",

volume = "1",

pages = "293--302",

journal = "Nanostructured Materials",

issn = "0965-9773",

publisher = "Pergamon Press Ltd.",

number = "4",

}

TY - JOUR

T1 - Formation and alloying of nanostructured β-W powders

AU - Angastiniotis, N. C.

AU - Kear, B. H.

AU - McCandlish, L. E.

AU - Ramanujachary, K. V.

AU - Greenblatt, M.

N1 - Funding Information: This work was suppofiedbythe Office of Naval Research undercon~act#N00014-91-J-1828.

PY - 1992

Y1 - 1992

N2 - We have been investigating the reductive decomposition of spray dried ammonium metatungstate (AMT). Reduction of the pyrolysed powder in flowing hydrogen at T ≥ 625° C creates α-W, with bcc structure. Reduction at T ≤ 575° C results in the formation of W3O, with A15 structure. In situ reduction experiments carried out in a controled atmosphere, high temperature X-ray powder diffractometer have shown that W3O transforms to β-W, in which most of the oxygen atoms are absent. Various experiments confirming the existence of WO1-x are described. Initial experiments on its alloying behavior with nitrogen are also discussed.

AB - We have been investigating the reductive decomposition of spray dried ammonium metatungstate (AMT). Reduction of the pyrolysed powder in flowing hydrogen at T ≥ 625° C creates α-W, with bcc structure. Reduction at T ≤ 575° C results in the formation of W3O, with A15 structure. In situ reduction experiments carried out in a controled atmosphere, high temperature X-ray powder diffractometer have shown that W3O transforms to β-W, in which most of the oxygen atoms are absent. Various experiments confirming the existence of WO1-x are described. Initial experiments on its alloying behavior with nitrogen are also discussed.

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U2 - 10.1016/0965-9773(92)90036-W

DO - 10.1016/0965-9773(92)90036-W

M3 - Article

AN - SCOPUS:0009118792

SN - 0965-9773

VL - 1

SP - 293

EP - 302

JO - Nanostructured Materials

JF - Nanostructured Materials

IS - 4

ER -

Formation and alloying of nanostructured β-W powders

Abstract

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