SiAlON Seramikleri Ve Fe-Esaslı Alaşımlar Arasında Meydana Gelen Kimyasal Etkileşimlerin İncelenmesi

Year 2009, Volume: 22 Issue: 2, 233 - 245, 31.12.2009

Bilge Yaman , Hasan Mandal

Abstract

Üç farklı kompozisyona sahip SiAlON seramikleri ile saf demir ve dört ayrı tipteki çelik arasında meydana gelen kimyasal etkileşim; statik etkileşim çifti deneyleri yoluyla incelenmiştir. Etkileşim çifti deneyleri; 10-2mbar vakum altında, 1150°C’de 5-7MPa yük kullanılarak 15 saat süreyle gerçekleştirilmiştir. Etkileşime giren seramik-metal çiftlerinin ara yüzeyleri optik ve taramalı elektron mikroskobunda (SEM) incelenmiş, enerji saçınımlı X-ışını spektrometresi (EDX) ile analiz edilmiştir. Bu çalışmada, seramik kompozisyonunun ve alaşım elementlerinin kimyasal reaktiviteye etkisi; etkileşim bölgeleri belirlenerek incelenmiş, SiAlON seramiklerinin çelik tipine bağlı olarak difüzivite eğilimleri karşılaştırılmış ve sonuçlar ayrıntılı olarak tartışılmıştır.

Keywords

Kimyasal Etkileşim, Reaktivite, Etkileşim Çiftleri, SiAlON.

Investigation Of Chemical Interactions Between SiAlON Ceramics And Fe-Based Alloys Couples

Abstract

The chemical interaction between SiAlON ceramics in three different

compositions and four different types of steel and also pure iron as reference, were investigated

by means of static interaction couple experiments. The tests were carried out in 10-2mbar

vacuum at 1150°C, under the pressure of 5-7MPa for 15 hours. Interfaces of reacted couples

were analysed by optical and scanning electron microscope (SEM) including energy-dispersive

X-Ray spectroscopy (EDX). In this study, the effects of alloying elements in steel and starting

compositions of SiAlON on the chemical reactivity were investigated by comparing the tendency

of diffusivity of SiAlON ceramics according to steel type and discussed in detail by determining

the interaction zones.

Keywords

Chemical Interaction, Reactivity, Interaction Couples, SiAlON.

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