Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00490095" target="_blank" >RIV/61389021:_____/18:00490095 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00023272:_____/18:10134107 RIV/68407700:21220/18:00330335

Výsledek na webu

<a href="http://dx.doi.org/10.17159/2411-9717/2018/v118n4a9" target="_blank" >http://dx.doi.org/10.17159/2411-9717/2018/v118n4a9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17159/2411-9717/2018/v118n4a9" target="_blank" >10.17159/2411-9717/2018/v118n4a9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Popis výsledku v původním jazyce

Expensive synthetic materials are often used to prepare coatings deposited by plasma spraying. We selected natural mineral tourmaline as an inexpensive alternative material and sprayed it successfully, forming a ceramic-like coating. The experimental powder for spraying was as-mined tourmaline schorl, and was crushed and sieved to the proper size for plasma spraying with a hybrid water-argon stabilized plasma torch (WSP-H). Deposits on metallic and ceramic substrates, as well as self-supporting plates and samples annealed in air at 1 000 °C, were further studied by optical microscopy, X-ray diffraction, thermal and mechanical analysis, and optical reflectance tests. The results showed that the coatings are highly porous (44 ± 8 % in the most extreme case) and partly amorphous. The crystallinity depended on the process parameters. During subsequent annealing tourmaline decomposed to a mullite-like phase and hematite whereas this process was accompanied by a microhardness increase. Plasma spraying of a material with structurally bonded water and with incongruent melting, where both factors are being considered as large disadvantages, was demonstrated

Název v anglickém jazyce

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Popis výsledku anglicky

Expensive synthetic materials are often used to prepare coatings deposited by plasma spraying. We selected natural mineral tourmaline as an inexpensive alternative material and sprayed it successfully, forming a ceramic-like coating. The experimental powder for spraying was as-mined tourmaline schorl, and was crushed and sieved to the proper size for plasma spraying with a hybrid water-argon stabilized plasma torch (WSP-H). Deposits on metallic and ceramic substrates, as well as self-supporting plates and samples annealed in air at 1 000 °C, were further studied by optical microscopy, X-ray diffraction, thermal and mechanical analysis, and optical reflectance tests. The results showed that the coatings are highly porous (44 ± 8 % in the most extreme case) and partly amorphous. The crystallinity depended on the process parameters. During subsequent annealing tourmaline decomposed to a mullite-like phase and hematite whereas this process was accompanied by a microhardness increase. Plasma spraying of a material with structurally bonded water and with incongruent melting, where both factors are being considered as large disadvantages, was demonstrated

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of the Southern African Institute of Mining and Metallurgy

ISSN

2225-6253

e-ISSN

—

Svazek periodika

118

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

ZA - Jihoafrická republika

Počet stran výsledku

7

Strana od-do

387-393

Kód UT WoS článku

000432973700009

EID výsledku v databázi Scopus

2-s2.0-85047975821