To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
Meanwhile, the range of additive contents and crystal temperature were discussed.
同时，讨论了添加剂的添加量范围和适宜的结晶温度。
Our approximate results for specific heat at the high temperature range have the same temperature and volume dependence as that from the dynamical theory of crystal lattices.
对于比热，其高温展开形式与由点阵动力学得到的结果有同样的温度及体积依存关系。
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