白色相是铜、黑色相是Cu₃P。挤压态的组织最均匀细密，Cu₃P弥散状分布于铜中；在线加热状态（简称拉拔态）Cu₃P有所聚积，但长大不明显；退火后的Cu₃P明显长大并大量聚积

The white phase is copper and the black phase is Cu3P. The structure in the extruded state is the most uniform and dense, and Cu3P is dispersed in the copper; in the online heating state (referred to as the drawn state) Cu3P accumulates, but the growth is not obvious; the annealed Cu3P obviously grows and accumulates in a large amount