| 配方类型： |
EMULSIONS |
| 配方说明： |
Metallic Powder Suspension in Alcohols (Powder Metal Casting) |
| 配方组成： |
"Carbopol" 941/0.50
Di-normal-butylamine/0.38
Methanol/14.00
Steel Powder/85.00 |
| 配制方法： |
Completely disperse the "Carbopol" 941 in the methanol and neutralize the dispersion with the amine. Stir in the powdered steel.
While the "Carbopol" resins are not generally useful as film forming agents or binders, the Carbopol 941/di-n-butylamine salt is very effective as a binder in this case. In this alcohol system, the di-n-butylamine salt is very effective as a binder in this case. In this alcohol system, the di-n-butylamine is uniquely useful as the neutralizing agent to enhance the resultant binding ability and to improve the "Carbopol" film characteristics.
The suspension above is poured into plaster casts, vibrated under vacuum to eliminate voids and dried at 180'F in a circulating air oven. After drying, the molded parts exhibited unusually good green strength and excellent surface finish. Although no mold release agent is used, the castings do not stick to the plaster mold release agent is used, the castings do not stick to the plaster mold. After sintering in a hydrogen atmosphere, the |
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