<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Three types of sintered alloys were fabricated based on cobalt, nickel and high-temperature alloy ZhS32-VI matrix with titanium carbide strengthening phase. TiC content was in a range of 30–50 vol. %. The melting temperatures of alloys are higher than 1320°C, and they may undergo undamaged through all technological procedures together with turbine blades, including soldering and outgassing. DSC analyses indicates no additional thermal effects until melting, which confirms their structural stability. The examinations of microstructure revealed three types of constituents – TiC particles, matrix solid solution and blow outs – structural defects having negative effects on all the studied properties. It was found that heat resistance of nickel based sintered alloys at the temperature of 1100°C is superior as compared with the alloys based on cobalt and alloy ZhS32-VI. It has been established that wear resistance in conditions of fretting wear at temperatures of 20, 850, 950 and 1050°C of sintered alloy with ZhS32-VI matrix is mostly superior as compared with the other alloys. The properties of produced alloys allow to use them for manufacturing of components of friction couples operating in conditions of high temperature fretting wear, including protective pads of turbine blades top shrouds contact faces.</p></abstract>

Three types of sintered alloys were fabricated based on cobalt, nickel and high-temperature alloy ZhS32-VI matrix with titanium carbide strengthening phase. TiC content was in a range of 30–50 vol. %. The melting temperatures of alloys are higher than 1320°C, and they may undergo undamaged through all technological procedures together with turbine blades, including soldering and outgassing. DSC analyses indicates no additional thermal effects until melting, which confirms their structural stability. The examinations of microstructure revealed three types of constituents – TiC particles, matrix solid solution and blow outs – structural defects having negative effects on all the studied properties. It was found that heat resistance of nickel based sintered alloys at the temperature of 1100°C is superior as compared with the alloys based on cobalt and alloy ZhS32-VI. It has been established that wear resistance in conditions of fretting wear at temperatures of 20, 850, 950 and 1050°C of sintered alloy with ZhS32-VI matrix is mostly superior as compared with the other alloys. The properties of produced alloys allow to use them for manufacturing of components of friction couples operating in conditions of high temperature fretting wear, including protective pads of turbine blades top shrouds contact faces.

Research on the Properties of Co-Tic and Ni-Tic Hip-Sintered Alloys

Engineering Department, Aerospace Institute

G.V. Kurdyumov Institute for Metal Physics

Acta Mechanica et Automatica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Research on the Properties of Co-Tic and Ni-Tic Hip-Sintered Alloys"}

Three types of sintered alloys were fabricated based on cobalt, nickel and high-temperature alloy ZhS32-VI matrix with titanium carbide strengthening phase....

Research on the Properties of Co-Tic and Ni-Tic Hip-Sintered Alloys

Publié en ligne: 18 avr. 2019

Pages: 57 - 67

Reçu: 13 avr. 2018

Accepté: 27 mars 2019

DOI: https://doi.org/10.2478/ama-2019-0009

Mots clés
Cobalt, nickel, titanium carbide, sintered alloys, heat resistance, wear resistance, melting temperature

© 2019 Tetiana Cherepova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Research on the Properties of Co-Tic and Ni-Tic Hip-Sintered Alloys

Publié en ligne: 18 avr. 2019

Pages: 57 - 67

Reçu: 13 avr. 2018

Accepté: 27 mars 2019

DOI: https://doi.org/10.2478/ama-2019-0009

Mots clésCobalt, nickel, titanium carbide, sintered alloys, heat resistance, wear resistance, melting temperature

© 2019 Tetiana Cherepova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
Cobalt, nickel, titanium carbide, sintered alloys, heat resistance, wear resistance, melting temperature