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以钢为基体，利用大气等离子喷涂技术制备了４种Ｂ_４Ｃ涂层（纯Ｂ_４Ｃ涂层和成分分布指数分别为Ｐ＝０．２，１，２的Ｂ_４Ｃ／Ｃｕ梯度涂层）．对这几种涂层的形貌进行了观察；对Ｂ_４Ｃ／Ｃｕ梯度涂层的残余热应力进行了分析：对纯Ｂ_４Ｃ涂层和Ｂ_４Ｃ／Ｃｕ梯度涂层进行了Ｘ射线电子束热冲击测试．结果表明，Ｐ＝１的Ｂ_４Ｃ／Ｃｕ梯度涂层具有最好的抗热震性．最后对Ｂ４Ｃ涂层的化学溅射性能进行了测试．
Four kinds of B_4C coatings (pure B_4C coating and B_4C / Cu gradient coating with component distribution index of P = 0.2,1,2, respectively) were prepared by plasma spray technique using steel as substrate. The morphology of these coatings was observed. Residual thermal stress of B_4C / Cu gradient coating was analyzed. X-ray electron beam thermal shock tests were carried out on pure B_4C coating and B_4C / Cu gradient coating. The results show that the B_4C / Cu gradient coating with P = 1 has the best thermal shock resistance. Finally, the chemical sputtering properties of B4C coating were tested.