Pin-on-disc investigation on copper-free friction materials dry sliding against cast iron

Leonardi, Mara; Menapace, C.; Matějka, Vlastimil; Gialanella, Stefano; Straffelini, Giovanni

doi:10.1016/j.triboint.2017.10.037

Cited by 60 publications

(31 citation statements)

References 41 publications

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“…To ensure good friction stability, the components of the brake lining should be selected carefully. The coefficient of friction is in the range of 0.3 industrial standard for the brake lining system (Leonardi et al, 2018). In the literature, it is stated that the coefficient of friction (μ) generally varies between 0.1 and 0.7 depending on the friction force and the temperature of the disc coating interface (Ravikiran and Jahanmir, 2001).…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation of a Novel Friction Modifier in Composite Materials

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2019

Turkish Journal of Engineering

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In this study, waste banana tree powder was turned into powder and its use in automotive brake lining was investigated. For this purpose, 3 different samples were produced by using powder metallurgy production techniques. Waste banana tree powder (WBTP) was added in different rates (3%, 6% and 9% by weight), keeping the determined content constant. Firstly, homogenous mixtures of the ingredients are provided and then final shapes are given by hot pressing method. The friction, wear, hardness and density analysis of the brake lining samples and the effects of the use of WBTP on the brake lining were evaluated.

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Section: Resultsmentioning

confidence: 99%

Experimental Investigation of a Novel Friction Modifier in Composite Materials

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Güdük

2019

Turkish Journal of Engineering

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“…The formation of cracks on the worn surface of composite S can be ascribed to the reduction of compactness of secondary contact plateaus because of lower thermal stability (see Fig. 6) [43]. The cracks also indicate that the secondary plateaus are not stable.…”

Section: Worn Surface Morphological Analysismentioning

confidence: 99%

Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

2020

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New elastomer-modified brake friction composites with the identical composition, but differing in the type of rubber, were developed by altering polar/non-polar elastomeric phases into the phenolic resin matrix. Effect of dispersion and interaction of the polar/non-polar rubbers with the matrix resin on dry sliding wear characteristics of the friction composites was investigated using a laboratory-scale pin-on-disc tribometer. The composites were prepared by hot mixing followed by compression molding and post-curing at a high temperature. Coefficient of friction (COF) and specific wear rate of the composites sliding against a cast-iron disc were measured and analyzed. Polar acrylonitrile-butadiene rubber (NBR, both powder, and bale rubber), and non-polar styrene-butadiene rubber (SBR) and ethylene-propylene-diene monomer (EPDM) were used with the phenolic resin where rubber islands and its polarity played the key role in delayed stress dissipation, while the hard matrix phase contributed to the intrinsic strength of the composites. This work describes how the distribution and interaction of polar and non-polar rubbers with the matrix resin influence the performance of brake friction composites. NBR (powder)-phenolic composite showed the highest stable average COF of 0.52 as compared to 0.36 for EPDM-based composite. NBR (powder)-based composite also exhibited ~1.5 times better specific wear rate (4.9 × 10 −3 mm 3 N −1 m −1) than EPDM-based composite (7.2 × 10 −3 mm 3 N −1 m −1). However, EPDM rubber-based composite showed a significant enhancement in thermal conductivity (0.43 W/m K). Morphological analyses revealed that the dispersion of rubber phase in phenolic matrix played a significant role in transforming the wear mechanism from abrasive to adhesive.

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“…İyi sürtünme stabilitesini sağlamak için, fren balatasının bileşenleri dikkatli seçilmelidir. Sürtünme katsayısı, fren balatası için 0,3-0,45 arası endüstriyel standart aralığına girmektedir [19]. Literatürde sürtünme katsayısının (μ) sürtünme kuvveti ve disk kaplama arayüzü sıcaklığına bağlı olarak genellikle 0,1 ile 0,7 arasında değiştiği belirtilmektedir [20].…”

Section: Bulgular Ve Tartışmaunclassified

Kompozit Fren Balatasında Bakır Oranının Frenleme Karakteristiğine Etkisi

Sugözü

2019

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Öz Taşıtların durması veya yavaşlatılması için fren sistemi kullanılmaktadır. Fren sisteminde yer alan balatalar diske sürtünerek aracın durmasını veya yavaşlamasını sağlamaktadır. Balatalar birden fazla malzemenin karışımından oluşmaktadır. Bakır, fren balatalarında metalik sürtünme malzemesi olarak kullanılmaktadır. Fren balatalarında kullanılan bakır termal iletkenliğinin yanında iyi bir fren performansı da sağlamaktadır. Bu çalışmada, fren balatalarında kullanılan bakırın frenleme performansına etkisi araştırılmıştır. Hazırlanan balata karışımı içerisine %5, %10 ve %15 oranlarında bakır ilave edilerek üç farklı balata üretilmiştir. Balata numunelerinin sürtünme katsayısı, aşınma, yoğunluk, sertlik gibi fiziksel ve mekanik özellikleri belirlenmiştir. Enerji Dağılım Spektrometresi (EDS) ve Taramalı Elektron Mikroskobu (SEM) ile morfolojik özellikleri incelenmiştir. Bakır oranı arttıkça balata performansının iyileştiği görülmüştür.

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Pin-on-disc investigation on copper-free friction materials dry sliding against cast iron

Cited by 60 publications

References 41 publications

Experimental Investigation of a Novel Friction Modifier in Composite Materials

Experimental Investigation of a Novel Friction Modifier in Composite Materials

Enhancement of tribological and thermo-mechanical properties of phenolic resin friction composites by improving interactions between elastomeric phase and matrix resin

Kompozit Fren Balatasında Bakır Oranının Frenleme Karakteristiğine Etkisi

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