Mechanical Properties and Tribological Characteristics of Copper Matrix Composite Reinforced with TiC–Ti

The paper studies the microstructure, phase composition, mechanical properties and tribological characteristics of copper matrix composites of the Cu–Fe–FeCr–MoS₂–C system reinforced with TiC–Ti composite inclusions sized 100—140 and 140—200 μm. The composites under study were obtained by sintering under pressure, and the content of reinforcing TiC–Ti inclusions was 3 vol. %, 5 vol. %, 7 vol. %, 9 vol. % and 11 vol. %. It is shown that the hardness of the composites under study increases with the addition of metalceramic inclusions TiC–Ti increases to 15 HBW 10/250/30, which is more than 40 % higher than the hardness of the matrix composite. It is revealed that composites reinforced with TiC–Ti inclusions have greater wear resistance compared to the matrix composite without the introduction of reinforcing inclusions. It was found that the composite containing 7 vol. % TiC–Ti inclusions 100—140 μm in size has the highest wear resistance, and an increase in the inclusion content to 9 vol. % and 11 vol. % leads to an increase in the wear intensity of the composite. With the introduction of more than 7 vol. % TiC–Ti composite inclusions 140—200 μm in size, a decrease in wear resistance also occurs. The maximum friction coefficient is demon-strated by the composite reinforced with 11 vol. % TiC–Ti inclusions 100–140 μm in size, which is 0.36 ± 0.03, and with an increase in the inclusion size to 140—200 μm, the highest friction coefficient is observed with the introduction of 7 vol. % TiC–Ti.

1. Xiao J. K., Xiao S.X., and Chen J. Wear Mechanism of Cu-Based Brake Pad for High-Speed Train Braking at Speed of 380 km/h // Tribology International. — 2020 (150) no. 106357, 1—8

2. Peng T., Yan Q., and Li G. The Braking Behaviors of Cu-Based Metallic Brake Pad for High-Speed Train under Different Initial Braking Speed // Tribology letters. — 2017 (65), no. 4, 135—148

3. Bodrova L.E., Mejlah A.G., Pastuhov E.A. Uprochnenie medi metallizovannymi vklyucheniyami karbidov hroma i niobiya // Fizika i himiya obrabotki materialov. — 2016, № 1, 68—75 (in Russian)

4. Fadin V.V., Kolubaev A.V., Aleutdinova M.I. Trenie kompozitov na osnove karbida titana, poluchennyh metodom tekhnologicheskogo goreniya // Trenie i iznos. — 2011 (32), № 6, 608—613 (in Russian)

5. Shuster L.Sh., Mamleev R., Kamaletdinova R.R. Iznos tribosopryazhenij iz keramiko-metallicheskogo materiala na osnove karbida titana // Trenie i iznos. — 2016 (37), № 2, 214—218 (in Russian)

6. Eremenko V.N., Buyanov Yu. I., Prima S.B. Stroenie diagrammy sostoyaniya sistemy titanmed' // Poroshkovaya metallurgiya. — 1966, № 6, 77 (in Russian)

7. Shmakov V.V., Buyakov A.S., Buyakova S.P. Fraktal'nyj analiz evolyucii topografii poverhnosti gomogennyh i dvojnyh kompozitov ZrB2–TaB2–SiC pri abrazivnom iznashivanii // Pis'ma v Zhurnal tekhnicheskoj fiziki. — 2024 (50), № 22, 11—15 (in Russian)

8. Fasihi P., Kendall O., and Abrahams R. Effect of Graphite and MoS2 Based Solid Lubricants for Application at Wheel-Rail Interface on the Wear Mechanism and Surface Morphology of Hypereutectoid Rails // Tribology International. — 2021 (157), no. 106886, 1—16

9. Prabhu T.R., Arivarasu M., and Chodancar Y. Tribological Behaviour of Graphite-Reinforced FeNiCrCuMo High-Entropy Alloy Self-Lubricating Composites for Aircraft Braking Energy Applications // Tribology Letters. — 2019 (67), no. 3, 78—93

10. Dudina D.V., Ukhina A.V., and Bokhonov B.B. The Influence of the Formation of Fe3C on Graphitization in a Carbon-Rich Iron-Amorphous Carbon Mixture Processed by Spark Plasma Sintering and Annealing // Ceramics International. — 2017 (43), no. 15, 11902—11906

11. Xiao Y., Zhang Z., and Yao P. Mechanical and Tribological Behaviors of Copper Metal Matrix Composites for Brake Pads Used in High-Speed Trains // Tribology International. — 2018 (119), 585—592

12. Bagheri G.H.A. The Effect of Reinforcement Percentages on Properties of Copper Matrix Composites Reinforced with TiC Particles // Journal of Alloys and Compounds. — 2016 (676), 120—126