MP11. Please determine true or false about the following statements:a. Inorganic and organic materials are all belong to metal-type material (F)b. All carbon based materials are organic materials.(F)c.Material science includes material chemistry and material physics(T)d. In some sense, material engineering can be treated as material processing.(T)MP3Pls pick out the true statements among the following items:a)New phase usually makes nucleation at defect points. Tb)Solid state phase transformation is easier to identify. Fc)Precipitation is a second order solid phase transformation. Fd) Phase diagram reflects phases under thermodynamic equilibrium conditions Te)In solid state phase transformation, the new phase generally grows along habit plane. Tf)Polycrystalline transformation is a first order phase transformation and it is diffusional.Tg)In second order phase transformation, there exist volume and entropy changes Fh)Eutectoid transformation is a kind of diffusional type transformation.TMP4True or false questions:a)The yield strength shows the resistance of the materials to permanent deformation.Tb)The plastic deformation is a kind of temporary deformation. Fc)The yield stress of ceramics is generally higher than that of metals. Td)The maximum strength in the stress-strain curve is the yield strength. Fe) Ductility indicates the general ability of a material to be plastically deformed. Tf)Plastic deformation is generally realized by atomic plane slipping. Tg) Metals possess large dislocation width, resulting in small yield strength, thus more ductile. While ceramics possess small dislocation width, thus lattice resistance is large, leading to brittle feature. Th) Material with more slip system exhibits better ductility. TMP59.true...
