Farklı Yük ve Hızlarda Cam Elyaf Takviyeli Polyester Kompozit Malzemelerin Aşınması

Abstract

Polimer matrisli Cam Elyaf Takviyeli Polyester (CTP) konpozit malzemeler yüksek özgül mukavemet, mükemmel elastiklik, düşük ağırlık, yüksek korozyon direnci, yüksek kimyasal direnç ve yüksek termal kararlılık gibi bazı özelliklere sahiptirler. Makine parçalarının en önemli hasar sebeplerinden biri aşınmadır. Aşınma, malzemelerin yüzey kimyalarını ve mikroyapılarını değiştirerek azaltılabilen bir yüzey özelliğidir. Bu nedenle CTP malzemelerin sadece mekanik özellikleri değil, aynı zamanda tribolojik davranışları da araştırılmalıdır. Bu çalışmanın amacı farklı dolgu ve reçine malzemelerinin farklı yük ve hızlarda CTP malzemelerin adhezif aşınma özelliği üzerine etkisini incelemektir. Numunelerin üretimlerinde farklı reçineler (reaktif ortoftalik polyester), takviye malzemeleri ve dolgular (cam kürecik ve alumina) kullanılmıştır. Başlangıçta, numuneler 150m’lik sabit kayma mesafesinde iki farklı yükte (F=10N, F=20N) ve iki farklı hızda (n=100rpm, n=200rpm) adhezif aşınma deneylerine tabi tutuldu. Tribometre üzerinden test boyunca sürtünme kuvveti ve sürtünme katsayısı değerleri ölçülmüştür. Numunelerin yoğunlukları da ölçüldü. Bir sonraki adımda aşınma iz kalınlıkları ölçüldü ve aşınma oranları hesaplandı. Sonuçlarda, düz ortoftalik polyester reçineye cam kürecik ilavesi aşınma oranını düşürdüğü görüldü. Numunelerin aşınma davranışı üzerine yükün etkisi hızın etkisinden daha fazla olduğu tesbit edildi.

Keywords

• Cam elyaf; polyester; dolgu malzemeleri; adhezif aşınma

The Wear of Glass Fiber Reinforced Polyester Composite Materials at Different Loads and Speeds

Abstract

Glass fiber reinforced polyester (GFRP) materials which are polymer matrix composites have some properties such as high specific strength, excellent elasticity, low weight, high corrosion resistance, high chemical resistance and high thermal stability. One of most important causes of failure of mechanical parts is wear. It is a surface property that can be reduced by changing the surface chemistries of the materials and microstructures. For this reason GFRP materials should be investigated not only for their mechanical properties but also for their tribological behaviours. The aim of this study is investigation of effects of different fillers and resins materials on adhesive wear properties of GFRP at different loads and speeds. In the sample production, different resins (reactive orthophtalic polyesters), reinforcing materials and fillers (glass beads, alumina) are used. . Initially, the samples were subjected to adhesive wear tests on two different loads (F=10N, F=20N) and two different speeds (n=100rpm, n=200rpm) at 150m sliding distance. The friction force and friction coefficient were measured during the test on tribometer. The densities of samples were measured. In the next step, the wear trace thicknesses were measured and the wear rates were calculated. In results, the addition of glass beads to plain orthophtalic polyester resin reduced wear rate. The influence of load effect on wear behavior of samples is more the influence of speed.

Keywords

• Glass fiber; polyester; filler materials; adhesive wear

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