STUDY OF MECHANICAL PROPERTIES FOR FILTER BAG MATERIALS UNDER THERMAL SHOCK

Year 2016, Volume: 26 Issue: 4, 375 - 379, 30.12.2016

Jianliang He Henggen Shen

Abstract

In this work, we present a novel facility and method for the measurement of mechanical properties of filter bag materials under thermal shock with pre-tensile loading. In contrast to most current test equipments, the new facility is not only able to provide constant cyclic thermal shock but also test tensile strength under high temperature at the same time. It reflects the real mechanical properties under high temperature after thermal shock with tensile loading. It discovers that thermal shock accelerates degradation of the mechanical properties of the filter bag materials. The effect of cyclical thermal shock on the filter bag materials microstructure is investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and dynamic mechanical analysis (DMA). It is found that the crystallinity of filter bag materials increases with increasing of thermal shock cycles. It is concluded that the thermal shock effects on crystallinity and microstructure of filter bag materials.

Keywords

Filter bag materials, Thermal shock, Measurement, Mechanical properties, Mechanism

ISIL ŞOK ALTINDA, FİLİTRE TORBASI MALZEME/KUMAŞLARININ MEKANİK ÖZELLİKLERİNİN İNCELENMESİ

Abstract

Bu çalışmada, ön gerilimli yükleme ile ısıl şok altında filtre torbası malzemelerinin mekanik özelliklerinin ölçümü için yeni bir tesis ve yöntem sunmaktayız. En güncel test cihazlarının aksine, yeni tesis ve yöntem sadece sabit periyodik ısıl şok sunabilmekte kalmadığı gibi, aynı zamanda yüksek sıcaklık altında, gerilme kuvvetini de test edebilmektedir. Gerilme yüklemeli ısıl şoktan sonra, gerçek mekanik özellikleri ortaya çıkarır. Isıl şok’un filitre torbası malzemelerinin mekanik özelliklerinin bozulmasını hızlandırdıgını keşfeder. Periyodik ısıl şokun filtre torbası malzemelerinin mikroyapısına etkisi, taramalı elektron mikroskopu (SEM), X-ışını kırınımı (XRD) ve dinamik mekanik analiz (DMA) ile araştırılmıştır. Filitre torbası malzemelerinin kristalinitesinin (kristalleşme derecelerinin), artan ısıl şok periyodları ile arttığı bulunmuştur. Isıl şokun, filtre torbası malzemelerinin kristalinitesi (kristalleşme derecesi) ve mikro yapısı üzerinde etkisi olduğu sonucuna varılmıştır.

Keywords

Filitre torbası malzemeleri, Isıl şok, Ölçme, Mekanik özellikler, Mekanizma

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