Thermal stability of fracture-resistant W-B-C coatings

a 2019

Thermal stability of fracture-resistant W-B-C coatings

MIRZAEI, Saeed, Pavel SOUČEK, Lukáš ZÁBRANSKÝ, Mostafa ALISHAHI, Vilma BURŠÍKOVÁ et. al.

Basic information

Original name

Thermal stability of fracture-resistant W-B-C coatings

Authors

MIRZAEI, Saeed, Pavel SOUČEK, Lukáš ZÁBRANSKÝ, Mostafa ALISHAHI, Vilma BURŠÍKOVÁ and Petr VAŠINA

Edition

Reactive Sputter Deposition, RSD 2019, 2019

Other information

Language

English

Type of outcome

Konferenční abstrakt

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Faculty of Science

Keywords (in Czech)

Magnetron Sputtering, Coating, Thermal stability, WBC

Keywords in English

Magnetron Sputtering, Coating, Thermal stability, WBC

Abstract

V originále

Recently, several studies have documented the potential applications of W-B-C coatings with enhanced mechanical properties in the tooling industry. Such applications often require a high thermal stability due to exposure of the material to high temperatures. Here, thermal stability of magnetron sputtered W-B-C coatings up to 1100 °C was investigated after both conventional furnace annealing and RTA methods. The microstrcural changes and mechanical behavior upon annealing were studied. As-deposited coatings exhibited a nearly amorphous character with a preserved microstructure and surface morphology until 900 °C while after annealing to 1100 °C, a strong crystallization was observed. The formation of WB, W2B, WC and W2C after conventional annealing and WB, WC and W2B after RTA was suggested by XRD. Cobalt atoms were diffused into the porous coating with a columnar growth to form CoWB phase. The high-resolution XPS scans revealed a dominant fraction of W−B bonds after RTA treatment. Mechanical properties were mostly affected by chemical composition and developed phases during annealing. Fracture resistance of the coating was generally decreased after annealing to 1100 °C. No oxidation layer was observed on the coating, even after storage for one year, which suggests that W-B-C coating with high oxidation resistance.

Links

GA15-17875S, research and development project

Name: Lokální mikrostrukturní změny vyvolané statickou a dynamickou indentací nanostrukturovaných a nanolaminovaných povlaků

Investor: Czech Science Foundation

LO1411, research and development project

Name: Rozvoj centra pro nízkonákladové plazmové a nanotechnologické povrchové úpravy (Acronym: CEPLANT plus)

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

MIRZAEI, Saeed, Pavel SOUČEK, Lukáš ZÁBRANSKÝ, Mostafa ALISHAHI, Vilma BURŠÍKOVÁ and Petr VAŠINA. Thermal stability of fracture-resistant W-B-C coatings. In Reactive Sputter Deposition, RSD 2019. 2019.

@proceedings{1663785,
   author = {Mirzaei, Saeed and Souček, Pavel and Zábranský, Lukáš and Alishahi, Mostafa and Buršíková, Vilma and Vašina, Petr},
   booktitle = {Reactive Sputter Deposition, RSD 2019},
   keywords = {Magnetron Sputtering, Coating, Thermal stability, WBC},
   language = {eng},
   title = {Thermal stability of fracture-resistant W-B-C coatings},
   year = {2019}
}

TY  - CONF
ID  - 1663785
AU  - Mirzaei, Saeed - Souček, Pavel - Zábranský, Lukáš - Alishahi, Mostafa - Buršíková, Vilma - Vašina, Petr
PY  - 2019
TI  - Thermal stability of fracture-resistant W-B-C coatings
KW  - Magnetron Sputtering, Coating, Thermal stability, WBC
N2  - Recently, several studies have documented the potential applications of W-B-C coatings with enhanced mechanical properties in the tooling industry. Such applications often require a high thermal stability due to exposure of the material to high temperatures. Here, thermal stability of magnetron sputtered W-B-C coatings up to 1100 °C was investigated after both conventional furnace annealing and RTA methods. The microstrcural changes and mechanical behavior upon annealing were studied. As-deposited coatings exhibited a nearly amorphous character with a preserved microstructure and surface morphology until 900 °C while after annealing to 1100 °C, a strong crystallization was observed. The formation of WB, W2B, WC and W2C after conventional annealing and WB, WC and W2B after RTA was suggested by XRD. Cobalt atoms were diffused into the porous coating with a columnar growth to form CoWB phase. The high-resolution XPS scans revealed a dominant fraction of W−B bonds after RTA treatment. Mechanical properties were mostly affected by chemical composition and developed phases during annealing. Fracture resistance of the coating was generally decreased after annealing to 1100 °C. No oxidation layer was observed on the coating, even after storage for one year, which suggests that W-B-C coating with high oxidation resistance.
ER  -

MIRZAEI, Saeed, Pavel SOUČEK, Lukáš ZÁBRANSKÝ, Mostafa ALISHAHI, Vilma BURŠÍKOVÁ and Petr VAŠINA. Thermal stability of fracture-resistant W-B-C coatings. In \textit{Reactive Sputter Deposition, RSD 2019}. 2019.

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