The unstable solid solution would disintegrate and transform into carbide phases in these systems of sisocso , tisocso and zrsocso , based on the increase of free energy introduced by the effect mechanical alloying . for the system of wsocso , the solid solution had not transformed into tungsten carbides but an amorphous phase , which was different from those systems . the exist of fe in these experiments , which came from the abrasion of ball - milling tool because of the higher hardness of w and w - c solid solution , would induce the crystalline - to - amorphous phase transformation during milling C50球磨体系中，继续球磨时，不稳定的固溶体在机械合金化作用下，由于体系能量提高，会发生分解相变，从而可以形成碳化物；对于w扣c50球磨体系， w ? c固溶体具有较高的硬度，磨削不锈钢质的球磨介质和球磨容器，而引入杂质，其中fe会促使固溶体向非晶相转变。
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