以自蔓延合成的MoSi2粉体为喷涂原料,采用大气等离子喷涂技术,在K403镍基合金表面制备了MoSi2涂层;采用XRD、SEM和EDS等仪器和高温氧化试验考察了喷涂功率对MoSi2涂层组织和抗高温氧化性能的影响.结果表明:涂层中均含有MoSi2相、Mo5Si3相和钼相,随喷涂功率的增大,涂层的相组成由富硅相向富钼相转变;采用30 kW喷涂功率可制备出主相为MoSi2且致密度较高的涂层,可以明显提高基体的抗高温氧化性能.
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