CN108863391A - 一种复合陶瓷涂层的制备方法 - Google Patents

一种复合陶瓷涂层的制备方法 Download PDF

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CN108863391A
CN108863391A CN201810819032.2A CN201810819032A CN108863391A CN 108863391 A CN108863391 A CN 108863391A CN 201810819032 A CN201810819032 A CN 201810819032A CN 108863391 A CN108863391 A CN 108863391A
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曹志欢
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Abstract

本发明公开了一种复合陶瓷涂层的制备方法,它包括以下步骤:a、研磨混合:将碳化硅微粉100份、纳米钨粉3‑7份、超细石墨粉末3‑7份、粘接剂5‑10份在研钵中研磨混合均匀制成混合物;b、湿法球磨:加入步骤a中所述混合物质量的80‑120%的去离子水和1‑3%的分散剂,在行星球磨机内,按照1500‑1800r/min的转速进行湿法球磨18‑20h,获得均匀悬浮液;本发明是将碳化硅微粉、纳米钨粉、超细石墨粉末和粘接剂,按照一定的比例进行湿法球磨分散,获得均匀悬浮液。此后采用纳米热喷涂技术,获得复合陶瓷涂层。本发明使用的材料绿色环保,喷涂工艺简单,所获得的复合陶瓷涂层,具有陶瓷材料的耐高温、耐磨和耐腐蚀等优点,同时兼具金属材料的强度和韧度,是新型复合陶瓷涂层材料。

Description

一种复合陶瓷涂层的制备方法
技术领域
本发明属于表面涂层领域,具体涉及一种复合陶瓷涂层的制备方法。
背景技术
现有的碳化硅陶瓷涂层属于具有较强共价键结合的稳定化合物,因此很难实现高温烧结环境下的材料致密性,使材料出现脆性大、易产生裂纹和使用寿命短等缺点,限制了进一步的应用推广。因此亟需开发具有微纳米微观致密结构的高强度、高韧性、耐高温、耐磨和耐腐蚀的碳化硅复合陶瓷涂层。
发明内容
一、要解决的技术问题
本发明要解决的技术问题是提供一种复合陶瓷涂层的制备方法,以解决所述技术问题。
二、技术方案
为解决所述技术问题,本发明所采用的技术方案是:一种复合陶瓷涂层的制备方法,它包括以下步骤:
a、研磨混合:将碳化硅微粉100份、纳米钨粉3-7份、超细石墨粉末3-7份、粘接剂5-10份在研钵中研磨混合均匀制成混合物;
b、湿法球磨:加入步骤a中所述混合物质量的80-120%的去离子水和1-3%的分散剂,在行星球磨机内,按照1500-1800r/min的转速进行湿法球磨18-20h,获得均匀悬浮液;
c、复合粉体:将上述悬浮液烘干粉碎后,用100-200目筛子过筛,获得混合粉体;
d、涂层制备:将上述粉体在1300-1500℃的高温下融化0.5-1.5h,形成熔融或半熔融状态的粒子流,以1200-2000m/s的速度喷涂于金属基体表面,获得碳化硅/石墨复合陶瓷涂层。
所述碳化硅微粉的D50直径为8-10微米,碳化硅微粉的纯度大于99.5%。
所述超细石墨粉末的D50直径为20-30微米,超细石墨粉末纯度大于99.5%。
所述粘接剂为羧甲基纤维素钠、钾水玻璃、羟乙基纤维素的其中一种。
所述分散剂为硅烷偶联剂KH570、3~氨丙基三乙氧基硅烷、聚乙二醇中的其中一种。
三、有益效果
本发明相比较于现有技术,具有如下有益效果:
本发明是将碳化硅微粉、纳米钨粉、超细石墨粉末和粘接剂,按照一定的比例进行湿法球磨分散,获得均匀悬浮液。此后采用纳米热喷涂技术,获得复合陶瓷涂层。本发明使用的材料绿色环保,喷涂工艺简单,所获得的复合陶瓷涂层,具有陶瓷材料的耐高温、耐磨和耐腐蚀等优点,同时兼具金属材料的强度和韧度,是新型复合陶瓷涂层材料。
具体实施方式
下面结合实施例,对本发明的具体实施方式作详细描述。
实施例1
将碳化硅微粉、纳米钨粉、超细石墨粉末和羧甲基纤维素钠,按照重量份100:3:3:6的比例在研钵中研磨混合均匀;加入100%的去离子水和2%的分散剂,在行星球磨机内,按照1500r/min的转速进行湿法球磨18h,获得均匀悬浮液;将上述悬浮液烘干粉碎后,用100目筛子过筛,获得混合粉体;将上述粉体在1500℃的高温下融化1.0h,形成熔融状态的粒子流,以1200m/s的速度喷涂于金属基体表面,获得碳化硅/石墨复合陶瓷涂层。本实施例获得的纳米钨粉粉末增强的碳化硅/石墨复合陶瓷涂层的性能评价结果见表1。
实施例2
将碳化硅微粉、纳米钨粉、超细石墨粉末和钾水玻璃,按照重量份100:4:3:8的比例在研钵中研磨混合均匀;加入120%的去离子水和3%的分散剂,在行星球磨机内,按照1800r/min的转速进行湿法球磨20h,获得均匀悬浮液;将上述悬浮液烘干粉碎后,用200目筛子过筛,获得混合粉体;将上述粉体在1500℃的高温下融化1.5h,形成熔融状态的粒子流,以1200m/s的速度喷涂于金属基体表面,获得碳化硅/石墨复合陶瓷涂层。本实施例获得的纳米钨粉粉末增强的碳化硅/石墨复合陶瓷涂层的性能评价结果见表2。
实施例3
将碳化硅微粉、纳米钨粉、超细石墨粉末和羟乙基纤维素,按照重量份100:6:5:8的比例在研钵中研磨混合均匀;加入100%的去离子水和3%的分散剂,在行星球磨机内,按照1500r/min的转速进行湿法球磨19h,获得均匀悬浮液;将上述悬浮液烘干粉碎后,用100目筛子过筛,获得混合粉体;将上述粉体在1500℃的高温下融化1.5h,形成熔融状态的粒子流,以1800m/s的速度喷涂于金属基体表面,获得碳化硅/石墨复合陶瓷涂层。本实施例获得的纳米钨粉粉末增强的碳化硅/石墨复合陶瓷涂层的性能评价结果见表3。
以上仅是本发明的具体应用范例,对本发明的保护范围不构成任何限制。

Claims (5)

1.一种复合陶瓷涂层的制备方法,其特征在于,它包括以下步骤:
a、研磨混合:将碳化硅微粉100份、纳米钨粉3-7份、超细石墨粉末3-7份、粘接剂5-10份在研钵中研磨混合均匀制成混合物;
b、湿法球磨:加入步骤a中所述混合物质量的80-120%的去离子水和1-3%的分散剂,在行星球磨机内,按照1500-1800r/min的转速进行湿法球磨18-20h,获得均匀悬浮液;
c、复合粉体:将上述悬浮液烘干粉碎后,用100-200目筛子过筛,获得混合粉体;
d、涂层制备:将上述粉体在1300-1500℃的高温下融化0.5-1.5h,形成熔融或半熔融状态的粒子流,以1200-2000m/s的速度喷涂于金属基体表面,获得碳化硅/石墨复合陶瓷涂层。
2.根据权利要求1所述的复合陶瓷涂层,其特征在于,所述碳化硅微粉的D50直径为8-10微米,碳化硅微粉的纯度大于99.5%。
3.根据权利要求1所述的复合陶瓷涂层的制备方法,其特征在于,所述超细石墨粉末的D50直径为20-30微米,超细石墨粉末纯度大于99.5%。
4.根据权利要求1所述的复合陶瓷涂层的制备方法,其特征在于,所述粘接剂为羧甲基纤维素钠、钾水玻璃、羟乙基纤维素的其中一种。
5.根据权利要求1所述的复合陶瓷涂层的制备方法,其特征在于,所述分散剂为硅烷偶联剂KH570、3~氨丙基三乙氧基硅烷、聚乙二醇中的其中一种。
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CN110903106A (zh) * 2019-12-13 2020-03-24 中建材(宜兴)新能源有限公司 一种SiC抗侵蚀纳米复合涂层及其制备方法和应用方法
CN110922188A (zh) * 2019-12-02 2020-03-27 昊石新材料科技南通有限公司 一种高耐磨抗烧蚀沉积碳化硅涂层及其制备工艺
CN113716897A (zh) * 2021-09-03 2021-11-30 孙建康 一种纳米陶瓷涂层阻尼的合成工艺
CN114000011A (zh) * 2021-09-28 2022-02-01 淮阴工学院 一种异质界面增强镍基合金及其成形方法

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Cited By (4)

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CN110922188A (zh) * 2019-12-02 2020-03-27 昊石新材料科技南通有限公司 一种高耐磨抗烧蚀沉积碳化硅涂层及其制备工艺
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CN113716897A (zh) * 2021-09-03 2021-11-30 孙建康 一种纳米陶瓷涂层阻尼的合成工艺
CN114000011A (zh) * 2021-09-28 2022-02-01 淮阴工学院 一种异质界面增强镍基合金及其成形方法

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