2017年2月14日星期二

crack


Crack is easy to produce the green thickness changed a lot in area, thinner area binder removal could easily, because of the different concentration of binder, the variation in thickness of green area will be the result of the thermal expansion coefficient of different stress, the stress and the thermal expansion coefficient and temperature gradient, stress, low temperature heat preservation can eliminate this kind of heating too fast is one of the most common cause of crack.

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