Is sintering enhanced under non-isothermal conditions?

摘要: Several authors have claimed that the sintering rate of a powder compact is enhanced during heating ramp. Their experimental results show that: (a) at any temperature shrinking increases with rate; (b) ramp between two isothermal periods, curve reaches maximum value; and (c) rapid reduction observed when an period suddenly reached after These features were tentatively explained by introducing some new mechanisms, which interfere mass transport. Here, however, we report these observations can be within framework standard theory sintering. It not necessary to include dependence transport mechanisms on in order describe behaviour.