In this paper, p type Fe 1- x Mn x Si 2( x =0—0 12) and n type Fe 1-y Co y Si 2( y =0—0 12) were synthesized by means of ceramic technology. The influence of additive amounts of Mn and Co, and heat treatment on the ...In this paper, p type Fe 1- x Mn x Si 2( x =0—0 12) and n type Fe 1-y Co y Si 2( y =0—0 12) were synthesized by means of ceramic technology. The influence of additive amounts of Mn and Co, and heat treatment on the amounts of β phase formed were studied. Experimental results indicate that addition of Mn and Co could inhibit the amounts and velocity of phase formation. High relative density( D r) of p type Fe 1- x Mnx Si 2 and n type Fe 1-y Co y Si 2 causes excellent corrosion resistance and heat resistance which are beneficial for manufacture of thermoelectric components.展开更多
Diamond single crystals grown from Fe-Ni-C system at high temperature-high pressure (HPHT) usually contain inclusions related to the metallic catalyst. During the diamond growth, the metallic inclusions are trapped by...Diamond single crystals grown from Fe-Ni-C system at high temperature-high pressure (HPHT) usually contain inclusions related to the metallic catalyst. During the diamond growth, the metallic inclusions are trapped by the growth front or are formed through reaction between the contaminants trapped in the diamond. In the present paper, the metallic inclusions related to the catalyst were systematically examined by transmission electron microscopy (TEM). The chemical composition and crystal structure of the metallic inclusions were for the first time determined by selected area electron diffraction pattern (SADP) combined with energy dispersive X-ray spectrometry (EDS). It is shown that the inclusions are mainly composed of orthorhombic FeSi2, fcc (FeNi)23C6, and orthorhombic Fe3C, hexagonal Ni3C.展开更多
文摘In this paper, p type Fe 1- x Mn x Si 2( x =0—0 12) and n type Fe 1-y Co y Si 2( y =0—0 12) were synthesized by means of ceramic technology. The influence of additive amounts of Mn and Co, and heat treatment on the amounts of β phase formed were studied. Experimental results indicate that addition of Mn and Co could inhibit the amounts and velocity of phase formation. High relative density( D r) of p type Fe 1- x Mnx Si 2 and n type Fe 1-y Co y Si 2 causes excellent corrosion resistance and heat resistance which are beneficial for manufacture of thermoelectric components.
文摘Diamond single crystals grown from Fe-Ni-C system at high temperature-high pressure (HPHT) usually contain inclusions related to the metallic catalyst. During the diamond growth, the metallic inclusions are trapped by the growth front or are formed through reaction between the contaminants trapped in the diamond. In the present paper, the metallic inclusions related to the catalyst were systematically examined by transmission electron microscopy (TEM). The chemical composition and crystal structure of the metallic inclusions were for the first time determined by selected area electron diffraction pattern (SADP) combined with energy dispersive X-ray spectrometry (EDS). It is shown that the inclusions are mainly composed of orthorhombic FeSi2, fcc (FeNi)23C6, and orthorhombic Fe3C, hexagonal Ni3C.
