5Casfledine T J.Use of filter materials in gating systems[J].Foundry Trade Journal,1985,960:15-21.
6Khan P R,Su W M.Flow of ductile iron through ceramic filters and the effects on the dross and fatigue properties[J].AFS Transactions,1987,[95]:105-112.
8Sutton W H,Morris J R.Development of ceramic foam materials for the filtration of high-temperature investment casting alloys[A].31st Annual Meeting ICI[C].Dallas:TX:1983.1 -21.
9Mollard F R,Davison N,Ceramic foam filter for molten metal[J].AFS Transactions,1978,86:479-486.
10Sutton W H,et al.Development of ceramic foam materials for filtering high temperature alloys[J].A FS Transactions,1985,93:339-346.