金屬粉末射出成型(Metal injection molding)，乃結合塑膠射出成型與
傳統粉末冶金的技術，對於高複雜性及精密性的零組件可大量生產，符合
經濟效益。本研究主要分為兩部份：第一部份為黏結劑與粉末的界面性質
研究；第二部份為羰基鐵粉試料的流變性質研究. 第一部份的研究目的在
於探討不同黏結劑系統對MIM製程的影響。實驗所使用的粉末為鐵粉及不
銹鋼304L粉，四種次黏結劑為：石蠟(PW)、巴西蠟(CW)、胺系滑劑(FAA
)及PE蠟(PEW)，主黏結劑均為LDPE；就四種系統的各階段測試結果，作分
析比較。四種蠟與基材(鐵、不銹鋼板)的接觸角均小於20°表示對金屬表
面有很好的濕潤性，LDPE則因分子量大，黏度高而有較大的接觸角；毛細
管流變儀的測試結果顯示：對影響流動性(1/η)的大小，依次為：PEW系>
PW系>FAA系 > CW 系，活化能(Ea)的大小：PW系>PEW系>CW系>FAA系，及
擬塑性值(n)依次為：PEW系>PW系>FAA系>CW系；經由機械強度測試，於鐵
系及不銹鋼系中均以PW系統所得之抗拉強度最大，FAA、CW系統次之，PEW
系統最小；燒結後試片的含碳量分析，以PW系統的含碳量最小，其破斷面
屬延性破壞；FAA與PEW系統之含碳量高，其破斷面屬於低延性破壞。第二
部份的研究係利用實驗計劃法探討黏結劑配方對 MIM 原料流變行為的影
響。將平均粒徑為5μm羰基鐵粉和 LDPE、PEW,及硬脂酸(SA)等黏結劑，
進行混練而得，然後進行流變性測試。由實驗計劃法列出15個配方比，經
由毛細管流變儀測試，得到各配比之流動性，活化能及擬塑性。經分析結
果，就單一變數言，對於原料增加流動性的影響，依序為SA>PEW>LDPE>Fe
；對降低活化能的影響，Fe > SA>PEW>LDPE；對增加擬塑性的影響，Fe>
LDPE>SA>PEW 。而變數相互間關係對於原料流動性﹑活化能及擬塑性的影
響，則經由相圖的分析得知。

Metal Injection Molding(MIM) is a technique which com- bines
plastic injection molding with powder metallurgy. There are two
parts in this research. In part 1,carbonyl iron powder,
stainless powder powder were chosen in the experiments as
powders; PE as primary binder,and Carnauba wax (CW),Paraffin
wax (PW),PE wax(PEW) and Fatty Acid Amide Lubricant(FAA) as
subbinders.The pro- perties of matel parts made ineach MIM
steps were analyzed. Theresult are as follows. All subbinders
could wet the metal surface because the corresponding contact
angle lower than20°; LDPE has high molecular weight and
viscosity , so its contact angle is greater than 50°.The
results from the capillary measure- ments indicate that the
order of increasing the flowability is PEW>PW>FAA>CW. The order
of the activationenergy is PW> PEW>CW>FAA. The order of
increasing the pseudoplasticity is CW>FAA>PW>PEW. PW system
exhibits the largest tensile strength and PEW system is the
wrost. PW system contains lower carbon content to show ductile
behavior in the frac- tured surface, and FAA and PEW system
have higher carbon content to show brittle behavior. Part 2
presents the influence of the binder composition on the flow
behavior of MIM feedstocks by experimentdesign method.In
experiment,15 feedstocks were prepared by mixing 5μm iron
powder (Fe) with binders containing polyethene (PE), PE wax
(PEW) and stearic acid (SA). The flowability activation energy
and pseudoplasticity of feedstocks were determined through
capillary viscosmeter measurement. The results indicate that
the order of increasing the flowabi- lity is SA>PEW>PE>Fe.The
order of reduceing the activation energy is Fe>SA>PEW>PE. The
order of increasing the pseu- doplasticity is Fe>PE>SA>PEW.
Metal Injection Molding(MIM) is a technique which com- bines