There are many factors affecting the production process depending on the raw materials, equipment and technology used in the production of composite materials. Reaching the desired density and strength of the product to be obtained is possible with appropriate arrangements and reinforcements to be made at every stage. Composite materials that combine more than one feature are produced in material groups. In this study, composite production was made with nickel-based (0.4% BN ceramic + 27.07% Astaloy CrM metallic) + 72.53%Ni powders by applying electroless nickel plating process, and these metallic and ceramic powders were used for reinforcement. After these samples were shaped circularly in a uniaxial cold press, they were sintered in an argon atmosphere conventional furnace at 1000, 1100, 1200, 1300 and 1400 °C for two hours. The mechanical and ultrasonic properties of the composite samples obtained with the addition of nickel-coated ceramic and metallic powder without electric current were determined. The effect of changing the sintering temperatures of Ni-based composite samples on ultrasonic properties was measured by ultrasonic pulse echo method. The sintering temperature was found to be one of the most effective factors on the propagation velocity of ultrasonic waves, Young's modulus and shear modulus, Poisson ratio. At the same time, Young's modulus and shear modulus and Poisson ratios changed depending on the propagation velocity of the ultrasonic waves. In addition, the results obtained by XRD analysis and SEM (Scanning Electron Microscopy) metallographic evaluation on the composite samples were supported

Keywords: Elastic modulus, Sintering temperature, Ultrasonic velocity, Poisson ratio, Hardness