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    沈卫, 顾燕芳. 磷酸钙骨水泥固化过程中浆体的微结构[J]. 华东理工大学学报(自然科学版), 1997, (5): 575-579.
    引用本文: 沈卫, 顾燕芳. 磷酸钙骨水泥固化过程中浆体的微结构[J]. 华东理工大学学报(自然科学版), 1997, (5): 575-579.
    Shen Wei, Gu Yanfang and Liu Changsheng *. Microstructure of CPC Paste During Solidification[J]. Journal of East China University of Science and Technology, 1997, (5): 575-579.
    Citation: Shen Wei, Gu Yanfang and Liu Changsheng *. Microstructure of CPC Paste During Solidification[J]. Journal of East China University of Science and Technology, 1997, (5): 575-579.

    磷酸钙骨水泥固化过程中浆体的微结构

    Microstructure of CPC Paste During Solidification

    • 摘要: 对新型人工骨材料磷酸钙骨水泥(CPC)浆体的微结构进行了研究,发现水化产物增多引起的浆体微结构变化是CPC凝结和硬化的本质原因。拌和时CPC浆体颗粒通过范德华分子力等较弱的力连成网状结构,随着水化产物增多,固体颗粒间距缩短,直至颗粒间发生结晶并接,网状结构逐渐转变为由化学键力连接,当浆体的塑性流动受化学键力的限制而终止时,浆体失去流动性而发生凝结。CPC浆体凝结后微结构继续变化,针状的羟基磷灰石产

       

      Abstract: The microstructure of CPC paste during solidification is studied in this paper. The results showed that the change of microstructure induced by hydrating products was the fundmental cause of setting and hardening. The initial structure of the paste is a net work joined by weak forces such as Van der Waals' forces. As the hydration goes on, the products increase gradually, and the distances between these powders reduce. At last, crystallizing connection takes place and the forces which join the new work change to chemical bondings, and when the plastic flow is limited by chemical bondings and terminated, the paste loses fluidity and sets. The microstructure of CPC paste varies continuously after setting. Petal like products increase, which make capillary pores lessen and the connecting strength between these powders increase gradually, so the compressive strength of the paste increases and hardening takes place.

       

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