Background: Owing to their lightweight and excellent specific mechanical properties, the
utilization of magnesium-based materials promises the desired weight/energy savings in demanding
applications. In the recent years, the addition of ceramic reinforcements to magnesium is being extensively
researched due to their potential to replace the commercial alloys for structural applications.
Method: One of the major limitations of Mg-based materials (alloys and nanocomposites) targeting aerospace/
high-temperature applications is its poor ignition resistance. In this regard, an attempt is made in
this study to develop and characterize the properties of a new Mg / 0.5, 1, 1.5, 2 CaO nanocomposite system
in terms of the ignition resistance. Further, microstructural and mechanical properties are also studied
to understand the overall effect of CaO addition. The Mg/CaO nanocomposites required for this study
were developed using disintegrated melt deposition method followed by hot extrusion.
Results: Microstructural investigation showed significant grain refinement and the presence of Mg2Ca
phase along with CaO particles. Evaluation of mechanical properties revealed significant improvements
as compared to pure magnesium. Evaluation of ignition properties revealed excellent improvements
in ignition temperature relative to magnesium as well as novel and commercial magnesiumbased
alloys. The result of this investigation may be useful in further studies in the development of
Mg/CaO nanocomposites for future commercial utilization, especially in the aviation, automotive and