Effect of hexagonal boron nitride (h-BN) addition on friction behavior of low-steel composite brake pad material for railway applications
TRIBOLOGY INTERNATIONAL, cilt.165, 2022 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 165
- Basım Tarihi: 2022
- Doi Numarası: 10.1016/j.triboint.2021.107274
- Dergi Adı: TRIBOLOGY INTERNATIONAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
- Anahtar Kelimeler: Low-steel composite friction materials, High temperature solid lubricant, Hexagonal boron nitride (h-BN), Friction and wear, SOLID LUBRICANTS GRAPHITE, TRIBOLOGICAL PROPERTIES, WEAR
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
In this study, low-steel composite friction materials containing different amount of h-BN were developed for railway vehicles. Addition of h-BN has no considerable effect on mechanical properties of the matrix structure. However, h-BN addition significantly affects friction and wear properties of the matrix material. While h-BN increases coefficient of friction of samples at low disk surface temperatures, it has a reverse effect after the temperature reaches to a critical level of 250-300 degrees C. Also, addition of 1.5 wt% h-BN to the matrix brings about more stable changes in friction coefficient during the braking periods under the extreme conditions as compared to the h-BN-free sample. Furthermore, low h-BN addition into the matrix results in better lubricity properties at relatively high temperatures.