Carbon nanotubes(CNTs)have a remarkable load-bearing ability.Recently however,multi-walled CNTs(MWCNTs)have been shown to possess even higher load-bearing ability when intimately embedded in an oxide ceramic matrix(Al2O3),because the load could be transferred not to only their outermost walls but also their generally unloaded inner walls via the strong interwall shear resistance originating from residual compressive stresses.