Production of spherical Mo and Mo-Si powders by spray drying of Si suspension in a water-soluble Mo precursor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152325" target="_blank" >RIV/00216305:26620/24:PU152325 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.apt.2023.104313" target="_blank" >https://doi.org/10.1016/j.apt.2023.104313</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apt.2023.104313" target="_blank" >10.1016/j.apt.2023.104313</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Production of spherical Mo and Mo-Si powders by spray drying of Si suspension in a water-soluble Mo precursor

Popis výsledku v původním jazyce

The study focuses on the production of molybdenum (Mo) and molybdenum-silicon (Mo-Si) powders using the spray drying method, followed by calcination and reduction steps. Mo powder was produced from an aqueous solution of ammonium hexamolybdate (AHM), while composite Mo-Si powders were produced from the same solution with suspended submicrometric Si particles. The as-sprayed powders were amorphous and had spherical hollow-shell morphology. In the case of Mo-Si composite powders, the powders had uniformly embedded Si aggregates on the surface. The spherical hollow-shell morphology of the powders was retained after calcination and reduction treatments. The observed chemical transition was AHM -. MoO3 -. Mo for Mo powders and AHM-Si -. MoO3-Si -. Mo-Si for composite powders. Extrusion tests demonstrated the suitability of the produced powders for extrusion-based additive manufacturing. The powders were extrudable at low load, resulting in stable filaments that stack layer by layer without deformation. The extruded filaments were then subjected to debinding and sintering processes, reaching an intermediate state of densification. Filaments fabricated from composite Mo-Si powders confirmed the alloying of Mo grains with Si during the sintering process. (c) 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved.

Název v anglickém jazyce

Production of spherical Mo and Mo-Si powders by spray drying of Si suspension in a water-soluble Mo precursor

Popis výsledku anglicky

The study focuses on the production of molybdenum (Mo) and molybdenum-silicon (Mo-Si) powders using the spray drying method, followed by calcination and reduction steps. Mo powder was produced from an aqueous solution of ammonium hexamolybdate (AHM), while composite Mo-Si powders were produced from the same solution with suspended submicrometric Si particles. The as-sprayed powders were amorphous and had spherical hollow-shell morphology. In the case of Mo-Si composite powders, the powders had uniformly embedded Si aggregates on the surface. The spherical hollow-shell morphology of the powders was retained after calcination and reduction treatments. The observed chemical transition was AHM -. MoO3 -. Mo for Mo powders and AHM-Si -. MoO3-Si -. Mo-Si for composite powders. Extrusion tests demonstrated the suitability of the produced powders for extrusion-based additive manufacturing. The powders were extrudable at low load, resulting in stable filaments that stack layer by layer without deformation. The extruded filaments were then subjected to debinding and sintering processes, reaching an intermediate state of densification. Filaments fabricated from composite Mo-Si powders confirmed the alloying of Mo grains with Si during the sintering process. (c) 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

<a href="/cs/project/LTC20068" target="_blank" >LTC20068: New materials for emerging energy technologies</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

ADVANCED POWDER TECHNOLOGY

ISSN

0921-8831

e-ISSN

1568-5527

Svazek periodika

35

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

12

Strana od-do

„“-„“

Kód UT WoS článku

001140657300001

EID výsledku v databázi Scopus

2-s2.0-85180942045