烧结理论的发展

来源期刊：中南大学学报(自然科学版)1979年第2期

论文作者：曾德麟

文章页码：102 - 117

关键词：烧结过程； 粘性流动； 物质迁移； 表面张力； 综合作用； 蒸发凝聚； 速度方程； 表面扩散； 塑性流动； 体积扩散

摘    要：本文是对烧结研究的历史和现状的简要评述。有理由将烧结研究的发展史划分为三个阶段。重点论述了烧结理论的创立及其现在的发展。详细描述和讨论了有关烧结过程物质迁移机构的各种研究工作,它们包括粘性流动,蒸发凝聚,体积、表面和晶介扩散以及塑性流动。然而,修正过的一些烧结理论是论述那些称作联合烧结机构的,其中特别报导了黄培云提出的综合作用理论。考虑了烧结的发生是扩散、流动和物理一化学反应的联合作用,能导出一个l_nl_n (d_m-d₀₎/(d_m-d)对1/T的线性方程,其中d₀和d_m是烧结开始和终了时粉末压制试样的密度,d是在给定时间和绝对温度T经过等温烧结后的瞬时密度。

Abstract: This paper gives a short review on the history and the present state of sintring research. It seems to be reasonable to divide the course of the history into three periods. Major emphasis is placed on illustration of the foundation of sintering theory and its current developments. Different studies concerning the mass-transport mechanism in sintering have in detail been described and discussed. These involve viscous flow, vaporisation-cond-ensation, volume,surface and grain-boundary diffusions,and plastic flow.However, some modified theories of sintering are dealt with concerning so-called concurrent sintering mechanism. From these, a complex-action theory presented by Huang Peiyun has been specially reported. In consideration of the fact that the sintering occurs by a combination of diffusion, flow andphysic-chemical reaction, a linear equation related to l_nl_n (d_m-d₀₎/(d_m-d) to 1/T couldbe derived, where do and dm are the densities of compacted powder sampl-es at the beginning and the ending of sintering, and d is their transient densities after isothermal sintering for a given time and at the absolute temperature T.