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在Ｒｅｎｅ＇Ｎ４单晶镍基高温合金的高温时效过程中，发现γ＇粒子由立方形逐渐形成梅花状、并继续演变成枝晶形态，同时γ＇枝晶具有择域生长特性．公式推导证明，γ＇粒子的生长尺寸有一临界值α＇超过这一临界值后，γ＇粒子将通过错配位错造成粒子周边凹陷，以协调γ＇能量的增加，并进一步发展为枝晶状．
During the aging process of Rene’N4 single crystal Ni-base superalloy, it was found that the γ ’particles gradually formed into a plumule shape from a cubic shape and continued to dendrite morphology, while the γ’ dendrite had a mesogenic growth characteristic. The formula derivation proves that when γ ’particle growth size has a critical value α’ exceeding this critical value, γ ’particles will cause depression around the particle by mismatch dislocation so as to coordinate the increase of γ’ energy and further develop into dendrite shape.