(Cr_(2/3)Ti_(1/3))_3AlC_2 and (Cr_(5/8)Ti_(3/8))_4AlC_3: New MAX-phase Compounds in Ti-Cr-Al-C System

摘要

Two new MAX compounds, (Cr_(2/3)Ti_(1/3))_3AlC_2 and (Cr_(5/8)Ti_(3/8))_4AlC_3, were successfully synthesized by hot-pressing elemental powders at 1500℃ for 1 h under 30 MPa in a flowing argon atmosphere. Their crystal structures were indentified and characterized by X-ray diffraction and transmission electron microscopy analysis. (Cr_(2/3)Ti_(1/3))_3AlC_2 and (Cr_(5/8)Ti_(3/8))_4AlC_3 have the same crystal structures with the well-characterized Ti_3AlC_2 and Ti_4,AlN_3, respectively.