What are the advantages and disadvantages of ceramic materials compared with metal materials? What are the reasons?

The main difference is that metal materials have good plasticity, while ceramic materials are basically inelastic and too brittle to be post-treated, so they can only be molded once. Ceramics are more metal, which has higher hardness, wear resistance, corrosion resistance and high temperature resistance than metals, and its high temperature performance is incomparable to metals. As for the use, it mainly depends on the demand.

The reason is that metals are connected by metal bonds, while ceramics are generally connected by ionic bonds and valence bonds, and the bond energy is very different.