Microwave Sintering of W-Ir Matrix for Improved Emission Performance of Cathode

Microstructural control of matrix is a critical way to improve the emission properties of cathode. In this work, microwave sintering strategy was developed to fabricate W-Ir alloy matrix with uniform grain size. The maximum of zero-field current density was measured to be 17.30 A/cm2 at 1050 °Cb, which is superior to M type cathode coated with Ir and Ir- Re-W films.