Size and cooling rate effects on the phase transition between proto and clino enstatite

Abstract

Protoenstatite(PEN), one of the polymorph of enstatite, is the stable phase at high temperature. It is generally considered that PEN is the unquenchable phase, but some people reported that PEN was observed at room temperature from experimental generative materials. The purpose of this study is to make clear the condition PEN can retain at room temperature which associated with grain size and cooling rate.