超音速火焰喷涂TiB2-40Co金属陶瓷涂层抗热震性能研究

来源 :第十八届全国高技术陶瓷学术年会 | 被引量 : 0次 | 上传用户：mgy1982

【摘要】

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【作者】

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陈枭王洪涛纪岗昌白小波吴小龙

【机构】

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九江市绿色再制造重点实验室,江西九江332005;九江学院机械与材料工程学院,江西九江332005

【出处】

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第十八届全国高技术陶瓷学术年会

【发表日期】

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2014年4期

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通过超音速火焰喷涂技术在不同氧气流量条件下将3种TiB2-40Co金属陶瓷涂层喷涂在Q235钢基体表面,研究3种涂层在600℃不同热震循环次数和800℃条件下的抗热震性能.通过扫描电子显微镜和X射线衍射仪对3种涂层在不同条件下热震后的表面和截面形貌及物相结构进行分析.研究结果表明,在600℃热震条件下,随着氧气流量的增加,涂层的抗热震性能降低,并在热震次数为150次,氧气流量为482L/min时,涂层中裂纹较多且失效最快.在800℃热震条件下,3种涂层的抗热震次数明显减少,其中以氧气流量为482L/min时涂层表面和截面产生的裂纹最多.通过对3种涂层在不同热震条件后的XRD分析发现,涂层的主要物相为TiB2和Co两相,并发现涂层中存在一定的氧化相(TiO2和Co3Ti3O).

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超音速火焰喷涂TiB2-40Co金属陶瓷涂层抗热震性能研究

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