As seen in Figure , the samples are cut and prepared by the wire-cut machine (electrical discharge machine) to perform the tensile test in the direction of tool movement. After the tensile test, Fractography is performed on the surfaces of the fractured samples to observe the fracture mechanism. To measure the hardness of the samples, a Vickers-type microhardness test is performed on the surface of the composites. The load of the microhardness test is 200 g with 15 seconds of applying time, and the test is performed at every 3 mm distance on the surfaces. Because the applied force in this test is minimal and the reported microhardness is very sensitive to the quality of the surface, the samples should be polished according to the metallographic steps. On this basis, the samples are sanded with silicon carbide paper (3000 grit size) and then polished with 0.3 μm alumina abrasive powder by a polishing machine.