SiO<sub>2</sub> AS HETEROGENEOUS NUCLEI OF INTERGROWTH EUTECTIC IN MODIFIED AS-CAST MEDI

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By calculation of thermodynamics,analysis of crystal structure and study of TEM andeletron probe,it is first discovered that SiO2 can be acted as one of the heterogeneous nu-clei for lamellar intergorowth eutectic(austenite and cementite)crystallizing in
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