Microwave sintering is fundamentally different from conventional sintering. In the microwave sintering process, the material is heated internally and volumetrically unlike in a conventional process where heat originates from an external heating source. Sintering cycle time for microwave sintering is much shorter as compared with the conventional sintering cycle. The rapid heating rate of microwave sintering greatly restricts tungsten grain coarsening, which resulted in fine tungsten grains distributed in Ni-Cu matrix. The aim of the present investigation is to study the sintering behavior of premixed and prealloyed 90W-7Ni-3Cu powders in both microwave and conventional furnaces. A comparative analysis has been made based on the sintered density, densification parameter, hardness and microstructures of the samples. The present investigation also includes the variation of matrix composition as a function of temperature by EPMA analysis.