Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride

To enhance the properties of tungsten diboride, we have synthesized and characterized solid solutions of this material with chromium, molybdenum, rhenium and zirconium. The obtained materials were subsequently deposited as coatings. Various concentrations of these transition metal elements, ranging...

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Autores principales:	Tomasz Mościcki, Rafał Psiuk, Joanna Radziejewska, Maria Wiśniewska, Dariusz Garbiec
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ternary tungsten boride spark plasma sintering magnetron sputtering electrical conductivity Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/106755c80db248859717061e159b015d
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spelling	oai:doaj.org-article:106755c80db248859717061e159b015d2021-11-25T17:16:38ZProperties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride10.3390/coatings111113782079-6412https://doaj.org/article/106755c80db248859717061e159b015d2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1378https://doaj.org/toc/2079-6412To enhance the properties of tungsten diboride, we have synthesized and characterized solid solutions of this material with chromium, molybdenum, rhenium and zirconium. The obtained materials were subsequently deposited as coatings. Various concentrations of these transition metal elements, ranging from 0.0 to 24.0 at.%, on a metals basis, were made. Spark plasma sintering was used to synthesize these refractory compounds from the pure elements. Elemental and phase purity of both samples (sintered compacts and coatings) were examined using energy dispersive X-ray spectroscopy and X-ray diffraction. Microindentation was utilized to measure the Vickers hardness. X-ray diffraction results indicate that the solubility limit is below 8 at.% for Mo, Re and Zr and below 16 at.% for Cr. Above this limit both diborides (W,TM)B<sub>2</sub> are created. Addition of transition metals caused decrease of density and increase of hardness and electrical conductivity of sintered compacts. Deposited coatings W<sub>1−x</sub>TM<sub>x</sub>B<sub>y</sub> (TM = Cr, Mo, Re, Zr; x = 0.2; y = 1.7–2) are homogenous, smooth and hard. The maximal hardness was measured for W-Cr-B films and under the load of 10 g was 50.4 ± 4.7 GPa. Deposited films possess relatively high fracture toughness and for WB<sub>2</sub> coatings alloyed with zirconium it is K<sub>1c</sub> = 2.11 MPa m<sup>1/2</sup>.Tomasz MościckiRafał PsiukJoanna RadziejewskaMaria WiśniewskaDariusz GarbiecMDPI AGarticleternary tungsten boridespark plasma sinteringmagnetron sputteringelectrical conductivityEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1378, p 1378 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ternary tungsten boride spark plasma sintering magnetron sputtering electrical conductivity Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	ternary tungsten boride spark plasma sintering magnetron sputtering electrical conductivity Engineering (General). Civil engineering (General) TA1-2040 Tomasz Mościcki Rafał Psiuk Joanna Radziejewska Maria Wiśniewska Dariusz Garbiec Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
description	To enhance the properties of tungsten diboride, we have synthesized and characterized solid solutions of this material with chromium, molybdenum, rhenium and zirconium. The obtained materials were subsequently deposited as coatings. Various concentrations of these transition metal elements, ranging from 0.0 to 24.0 at.%, on a metals basis, were made. Spark plasma sintering was used to synthesize these refractory compounds from the pure elements. Elemental and phase purity of both samples (sintered compacts and coatings) were examined using energy dispersive X-ray spectroscopy and X-ray diffraction. Microindentation was utilized to measure the Vickers hardness. X-ray diffraction results indicate that the solubility limit is below 8 at.% for Mo, Re and Zr and below 16 at.% for Cr. Above this limit both diborides (W,TM)B<sub>2</sub> are created. Addition of transition metals caused decrease of density and increase of hardness and electrical conductivity of sintered compacts. Deposited coatings W<sub>1−x</sub>TM<sub>x</sub>B<sub>y</sub> (TM = Cr, Mo, Re, Zr; x = 0.2; y = 1.7–2) are homogenous, smooth and hard. The maximal hardness was measured for W-Cr-B films and under the load of 10 g was 50.4 ± 4.7 GPa. Deposited films possess relatively high fracture toughness and for WB<sub>2</sub> coatings alloyed with zirconium it is K<sub>1c</sub> = 2.11 MPa m<sup>1/2</sup>.
format	article
author	Tomasz Mościcki Rafał Psiuk Joanna Radziejewska Maria Wiśniewska Dariusz Garbiec
author_facet	Tomasz Mościcki Rafał Psiuk Joanna Radziejewska Maria Wiśniewska Dariusz Garbiec
author_sort	Tomasz Mościcki
title	Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
title_short	Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
title_full	Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
title_fullStr	Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
title_full_unstemmed	Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
title_sort	properties of spark plasma sintered compacts and magnetron sputtered coatings made from cr, mo, re and zr alloyed tungsten diboride
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/106755c80db248859717061e159b015d
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Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride

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