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Hard and soft boiled egg can be determined by the heating time, but some things as soon as it can not be changed, such as hard-boiled eggs can not be soft. In the manufacture of metals and alloys have faced similar problems when the material property is set, the production can not be changed. Therefore, engineers in the design of mechanical properties, it is often faced with fish and bear's paw can not have both the plight of the greater hardness, brittleness, the greater, the worse will the ability of anti-injury.
In the development process, researchers will precious metals such as gold or platinum into the acid solution corrosion, materials formed in the small pipes and holes; then a nano-structured materials in the framework of perfusion to the entire channel, but also allow each Are fully filled with a porous conductive liquid (such as a simple salt solution or weak acid solution), into a hybrid of metal and liquid materials.
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