*2.2. Mechanical Property*

The density of the as-prepared Ti3SiC2/Cu composites was measured by the Archimedes method. Cylinder specimens with a size of ϕ5 mm × 12 mm were machined for compressive strength testing, which was performed on WDW-100 universal materials testing machine (Jinan Hansen Precision Instrument Co., Ltd., Jinan, China). The Vickers hardness of the composites was determined in an MHVD-50AP microhardness tester (Shanghai Jujing Precision Instrument Manufacturing Co., Ltd., Shanghai, China) at a load of 1 kg with a dwell time of 10 s.
