Hayao Miyazaki is a popular Anime film maker in Japanâs Anime industry. Most if not all of his work are associated and distributed by Studio Ghibli, and the English dubs are distributed by Disney itself in America which is partly why Miyazaki films are so popular in the western world.
Kevlar is a new friction material. After proving its endurance in the armor industry, Kevlar is also used in making clutch and brake pads. Kevlar is a durable friction material that can last two to five times than a conventional friction material.
In general when two metals are rubbing against one another, you want one surface to be harder than the other surface. The softer metal will wear faster rather than both wearing. In the case of engine block and piston, if you are given a choice to replace a worn out block vs replacing a worn out pistons, the pistons will be much easier and cheaper to replace. Furthermore (in general) the friction coefficient of a low friction metal sliding against a slightly different low friction metal is superior to (in other words lower than) the two surfaces being identical.