等離子噴涂法制備B<sub>4</sub>C/Cu梯度材料

等離子噴涂法制備B₄C/Cu梯度材料

摘要: 以鋼為基體,利用大氣等離子噴涂技術制備了4種B₄C涂層(純B₄C涂層和成分分布指數分別為p=0.2,1,2的B₄C/Cu梯度涂層).對這幾種涂層的形貌進行了觀察;對B₄C/Cu梯度涂層的殘余熱應力進行了分析:對純B₄C涂層和B₄C/Cu梯度涂層進行了X射線電子束熱沖擊測試.結果表明,p=1的B₄C/Cu梯度涂層具有最好的抗熱震性.最后對B₄C涂層的化學濺射性能進行了測試.

Abstract: Four types of B.C coatings (one is B₄C non-FGM coating and others are B₄C/Cu FGM coatings with the composition distribution factor p=0.2, 1, 2) were fabricated by atmosphere plasma spray on copper substrates. The microstructure of B₄C/Cu FGM coatings was observed by SEM. The residual Stress was analyzed by XRD. The thermal cycling behavior for both non-FGM coating and FGM coating was investigated. B₄C/Cu FGM coating with p=l shows better thermal shock resistance comparing with that of non-FGM coating and other B₄C/Cu FGM coatings. The chemical sputtering performance of B₄C coating was also tested.