# Density of Liquid Niobium and Tungsten and the Estimation of Critical Point Data

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

### Abstract

Density as a function of temperature was measured for the liquid transition metals niobium and tungsten by means of ohmic pulse-heating. The generated data are extensively compared to the existing literature data, and the uncertainty is critically assessed according to the guide to the expression of uncertainty in measurement (GUM). Starting from the obtained liquid-phase density regression, the phase diagram, and the critical point, i.e., critical temperature $$T_{\mathrm {c}}$$Tcand critical density $$\rho _{\mathrm {c}}$$ρcof niobium and tungsten are estimated. The so-obtained critical point for these two high-melting metals is compared to the data available in the existing literature.
Originalsprache englisch 3646-3653 8 Metallurgical and materials transactions / A 2019 50 https://doi.org/10.1007/s11661-019-05262-5 Veröffentlicht - 1 Jul 2019

### Fingerprint

Niobium
Density of liquids
Tungsten
niobium
critical point
tungsten
Metal melting
Liquids
liquids
Phase diagrams
Transition metals
pulse heating
liquid metals
Heating
Temperature
regression analysis
critical temperature
liquid phases
transition metals
phase diagrams

### ASJC Scopus subject areas

• !!Condensed Matter Physics
• !!Mechanics of Materials
• !!Metals and Alloys

### Dies zitieren

in: Metallurgical and materials transactions / A, Jahrgang 2019, Nr. 50, 01.07.2019, S. 3646-3653.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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AB - Density as a function of temperature was measured for the liquid transition metals niobium and tungsten by means of ohmic pulse-heating. The generated data are extensively compared to the existing literature data, and the uncertainty is critically assessed according to the guide to the expression of uncertainty in measurement (GUM). Starting from the obtained liquid-phase density regression, the phase diagram, and the critical point, i.e., critical temperature Tc and critical density ρc of niobium and tungsten are estimated. The so-obtained critical point for these two high-melting metals is compared to the data available in the existing literature.

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