Fully-dense Mn3Zn0.7Ge0.3N /Al composites with zero thermal expansion behavior around room temperature

Mn3Zn0.7Ge0.3N/Al composites were successfully fabricated by pressure infiltration technology. The large positive thermal expansion of Al is suppressed by adding Mn3Zn0.7Ge0.3N component. Nearly zero thermal expansion is achieved in the composite with 30 vol.% Mn3Zn0.7Ge0.3N. Moreover, the bending stress and modulus of Mn3Zn0.7Ge0.3N/Al composites increase gradually with increasing Mn3Zn0.7Ge0.3N content. The low thermal expansion and good mechanical properties of these materials could be beneficial to the electronic packaging and precision fields.