(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 对粉末注射成形粘结剂组分的热力学参数进行了计算，并通过实验观察得到了组分相容性的判据。分别以PVB，EVA，PMMA为高分子组分，讨论了它们与低分子量组分PEG的相容性，并通过混炼机混炼和偏光显微镜观察，得到了ΔG/T＜1.5可工艺相容、ΔG/T＞3.0工艺不相容的热力学判据。
关键字: 粉末注射成形; 热力学; 相容性; 粘结剂
for powder injection molding
（State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, P.R.China）
Abstract:Thermodynamic parameters of binder ingredients for powder injection molding were calculated. These ingredients of binder were mixed in order to get a means to determine theoretically the compatibility of ingredients. Polymers, such as PVB, EVA and PMMA were used respectively to mix with PEG. The micrograph of PEG-PMMA mixtures is also adopted to certify that when ΔG/T＜1.5, binder ingredients are compatible, while ΔG/T＞3.0, binder ingredients are incompatible.
Key words: powder injection molding； thermodynamics； compatibility； binder
