Tungsten Heavy Alloys from Mixed Feedstock by RF Plasma

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00581973" target="_blank" >RIV/61389021:_____/23:00581973 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/23:00368601 RIV/00216208:11320/23:10476703

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11666-023-01647-6" target="_blank" >https://link.springer.com/article/10.1007/s11666-023-01647-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11666-023-01647-6" target="_blank" >10.1007/s11666-023-01647-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tungsten Heavy Alloys from Mixed Feedstock by RF Plasma

Popis výsledku v původním jazyce

Tungsten heavy alloys (WHA) are particulate composites of spherical W particles embedded in a ductile Ni-rich matrix. In our study, pre-treated W and Ni feedstock powders were used to prepare three different compositions (all wt.%) for spraying: W-10Ni, W-20Ni for two different WHA, and W-65Ni for a matrix-only material without the reinforcing W particles. Using radio frequency inductively coupled plasma spraying (RF-ICP) method, low porosity deposits were obtained with ductility exceeding 5%. By a detailed study of the microstructure and the particle-matrix interfaces, the mechanism of the composite formation was identified: a rapid dissolution of W in the liquid Ni and a subsequent W particle solidification followed by the solidification of the matrix. The mechanical properties of the composites are defined by the Ni-rich matrix (tough and significantly stronger than pure Ni) with well bonded stiff W particles. The elastic behavior was related to the W content following the Reuss model, describing a layered composite modulus in a serial configuration. Contrary to this, in the plastic regime, all WHA exhibited nearly identical behavior regardless of the W content. In this regime, the deformation of the W particles reached several percent, indicating an extremely strong particle-matrix bonding. Last, the failure mechanisms of the materials were investigated, with the matrix behavior governing the fatigue failure, and particle-matrix decohesion dominating in the static loading at higher loads.

Název v anglickém jazyce

Tungsten Heavy Alloys from Mixed Feedstock by RF Plasma

Popis výsledku anglicky

Tungsten heavy alloys (WHA) are particulate composites of spherical W particles embedded in a ductile Ni-rich matrix. In our study, pre-treated W and Ni feedstock powders were used to prepare three different compositions (all wt.%) for spraying: W-10Ni, W-20Ni for two different WHA, and W-65Ni for a matrix-only material without the reinforcing W particles. Using radio frequency inductively coupled plasma spraying (RF-ICP) method, low porosity deposits were obtained with ductility exceeding 5%. By a detailed study of the microstructure and the particle-matrix interfaces, the mechanism of the composite formation was identified: a rapid dissolution of W in the liquid Ni and a subsequent W particle solidification followed by the solidification of the matrix. The mechanical properties of the composites are defined by the Ni-rich matrix (tough and significantly stronger than pure Ni) with well bonded stiff W particles. The elastic behavior was related to the W content following the Reuss model, describing a layered composite modulus in a serial configuration. Contrary to this, in the plastic regime, all WHA exhibited nearly identical behavior regardless of the W content. In this regime, the deformation of the W particles reached several percent, indicating an extremely strong particle-matrix bonding. Last, the failure mechanisms of the materials were investigated, with the matrix behavior governing the fatigue failure, and particle-matrix decohesion dominating in the static loading at higher loads.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Thermal Spray Technology

ISSN

1059-9630

e-ISSN

1544-1016

Svazek periodika

32

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

16

Strana od-do

2747-2762

Kód UT WoS článku

001060052200001

EID výsledku v databázi Scopus

2-s2.0-85168860965