| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.28 ( June 1993 ) Special Issue on Chemicals and New Materials and Construction Materials ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| A Sintering Mechanism of KMFC Green Compact
for High Density Carbon Blocks Katsuhiro Nagayama, Takayuki Torii, Hitomi Hatano, Noriyoshi Fukuda |
|
Synopsis : Kawasaki Steel's new carbon powder, KMFC (Kawasaki mesophase fine carbon) is produced from mesophase spherules formed by heat-treating pitch. KMFC has out-standing self-sinterability to produce isotropic carbon blocks of high density and strength without any extra binder components. In the present study, changes in the physical properties of KMFC compacts during the sintering process were examined in order to determine the sintering mechanism of a KMFC green compact. The high densification and high strength of KMFC compacts result from the large reduction in pore volume due to he fusion of KMFC at 400-600, and from the large shrinkage of the compact over 600. Light fractions such as HS (hexane-soluble) components, AS (acetone-soluble) components, and TMO (tar middle oil) play an important role in achieving this high densification and high strength by governing the fusibility of KMFC particles at 400-600 for their subsequent adhesion. |
| TextiPDF: 6p./262kbj |