CN116375477A - 一种高硬度、抗氧化的高熵陶瓷及其制备方法 - Google Patents
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Abstract
本发明公开了一种高硬度、抗氧化的高熵陶瓷,包括元素Ti、Cr、Mo、Hf、Zr和B,其原子百分比为Ti:Cr:Mo:Hf:Zr:B=1:1:1:1:1:10。高熵陶瓷的制备方法为将原料采用无压烧结制备成粉,SPS制备成块体。本发明采用了碳硼热还原法制备高熵陶瓷粉体,以及放电等离子烧结制备高熵陶瓷块体,所需实验设备简单,操作容易,便于生产,同时在1000℃氧化456h以内,该氧化层不会出现明显剥落,具有较好的抗氧化能力。本发明制备的高熵陶瓷具有更为优良的抗氧化性能、热力学性能和熵稳定性。
Description
技术领域
本发明涉及高熵陶瓷技术领域,具体为一种高硬度、抗氧化的高熵陶瓷及其制备方法。
背景技术
高熵合金的概念最初是由学者叶均蔚教授提出:具有五中主要金属元素的合金,且每种主元含量在5-35at.%之间。在2015年高熵陶瓷被首次提出,Rost等人报道了一种高熵氧化物陶瓷,之后各种不同晶体结构的高熵氧化物金体结构被发现,且出现了高熵硼化物、高熵碳化物、高熵硅化物陶瓷。相关文章成指数性增长。与传统单组元陶瓷相比,高熵陶瓷具有更加优异的性能。高熵概念的引入使陶瓷材料的成分更加丰富,不仅获得了混合性能更好的高硬度材料,还在一些功能性领域得到广泛的应用:如热电材料、催化剂、电极材料、热障涂层、耐磨和耐腐蚀涂层等。
但现有的高熵陶瓷抗氧化性能以及抗烧蚀性能较弱,不具备优良的力学性能。
发明内容
针对上述存在的技术不足,本发明的目的是提供一种高硬度、抗氧化的高熵陶瓷及其制备方法,以解决背景技术中提出的问题。
为解决上述技术问题,本发明采用如下技术方案:
本发明提供一种高硬度、抗氧化的高熵陶瓷,包括元素Ti、Cr、Mo、Hf、Zr和B,其原子百分比为Ti:Cr:Mo:Hf:Zr:B=1:1:1:1:1:10。
本发明提供了一种高硬度、抗氧化的高熵陶瓷的制备方法,将原料采用无压烧结制备成粉,SPS制备成块体。
优选地,将TiO2、Cr2O3、MoO3、HfO2、ZrO2、CB4按照原子比Ti:Cr:Mo:Hf:Zr=1:1:1:1:1对金属氧化物进行称重,以及加入计算后过量20%的CB4,在高能行星球磨中球磨10小时,球料比=5:1,球磨介质为酒精,转速为340r/min。
优选地,将球磨好的粉末放进高温石墨坩埚中,采用无压烧结;烧结温度为1600摄氏度,烧结气氛为氩气,烧结真空度为1Pa,升温速度为120℃/min,烧结时间为2h,金属氧化物和碳化硼发生还原反应,生成对应的硼化物,由于是采用粉末进行烧结,其中会有部分粉末会生成固溶体。
优选地,将烧结后的粉末放入球磨罐中按照之前的工艺,进行碾碎,所得粉末,放入石墨磨具中进行SPS烧结,SPS烧结温度为2000摄氏度,压力为30Mpa,时间为10min,升温速度为100℃/min。
本发明的有益效果在于:
本发明采用了碳硼热还原法制备高熵陶瓷粉体,以及放电等离子烧结制备高熵陶瓷块体,所需实验设备简单,操作容易,便于生产,同时在1000℃氧化456h以内,该氧化层不会出现明显剥落,具有较好的抗氧化能力。
本发明制备的高熵陶瓷具有更为优良的抗氧化性能、热力学性能和熵稳定性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的原料粉末XRD图;
图2为本发明实施例提供的原料粉末SEM图;
图3为本发明实施例提供的块体在1000℃,456h以内的氧化电镜图;
图4为本发明实施例提供的块体1000℃氧化1000h示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例:
如图1-图4所示,本发明提供了一种高硬度、抗氧化的高熵陶瓷,所述高熵陶瓷由Ti、Cr、Mo、Hf、Zr和B元素组成,其原子百分比为Ti:Cr:Mo:Hf:Zr:B=1:1:1:1:1:10。
本发明提供了一种高硬度、抗氧化的高熵陶瓷的制备方法,将原料采用无压烧结制备成粉,SPS制备成块体。
进一步的,将TiO2、Cr2O3、MoO3、HfO2、ZrO2、CB4按照原子比Ti:Cr:Mo:Hf:Zr=1:1:1:1:1对金属氧化物进行称重,以及加入计算后过量20%的CB4,在高能行星球磨中球磨10小时,球料比=5:1,球磨介质为酒精,转速为340r/min。
进一步的,将球磨好的粉末放进高温石墨坩埚中,采用无压烧结;烧结温度为1600摄氏度,烧结气氛为氩气,烧结真空度为1Pa,升温速度为120℃/min,烧结时间为2h,金属氧化物和碳化硼发生还原反应,生成对应的硼化物,由于是采用粉末进行烧结,其中会有部分粉末会生成固溶体。
进一步的,将烧结后的粉末放入球磨罐中按照之前的工艺,进行碾碎,所得粉末,放入石墨磨具中进行SPS烧结,SPS烧结温度为2000摄氏度,压力为30Mpa,时间为10min,升温速度为100℃/min。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。
Claims (5)
1.一种高硬度、抗氧化的高熵陶瓷,其特征在于,包括元素Ti、Cr、Mo、Hf、Zr和B,其原子百分比为Ti:Cr:Mo:Hf:Zr:B=1:1:1:1:1:10。
2.如权利要求1所述的一种高硬度、抗氧化的高熵陶瓷的制备方法,其特征在于,将原料采用无压烧结制备成粉,SPS制备成块体。
3.如权利要求1所述的一种高硬度、抗氧化的高熵陶瓷的制备方法,其特征在于,将TiO2、Cr2O3、MoO3、HfO2、ZrO2、CB4按照原子比Ti:Cr:Mo:Hf:Zr=1:1:1:1:1对金属氧化物进行称重,以及加入计算后过量20%的CB4,在高能行星球磨中球磨10小时,球料比=5:1,球磨介质为酒精,转速为340r/min。
4.如权利要求1所述的一种高硬度、抗氧化的高熵陶瓷的制备方法,其特征在于,将球磨好的粉末放进高温石墨坩埚中,采用无压烧结;烧结温度为1600摄氏度,烧结气氛为氩气,烧结真空度为1Pa,升温速度为120℃/min,烧结时间为2h,金属氧化物和碳化硼发生还原反应,生成对应的硼化物,由于是采用粉末进行烧结,其中会有部分粉末会生成固溶体。
5.如权利要求1所述的一种高硬度、抗氧化的高熵陶瓷的制备方法,其特征在于,将烧结后的粉末放入球磨罐中按照之前的工艺,进行碾碎,所得粉末,放入石墨磨具中进行SPS烧结,SPS烧结温度为2000摄氏度,压力为30Mpa,时间为10min,升温速度为100℃/min。
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CN110511035A (zh) * | 2019-08-05 | 2019-11-29 | 广东工业大学 | 一种高韧性高耐磨性的高熵陶瓷及其制备方法和应用 |
CN110606749A (zh) * | 2019-09-29 | 2019-12-24 | 石家庄铁道大学 | 一种高熵硼化物陶瓷材料及其制备方法 |
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CN110002879A (zh) * | 2019-03-22 | 2019-07-12 | 广东工业大学 | 一种致密超硬的高熵硼化物陶瓷及其制备方法和应用 |
CN110511035A (zh) * | 2019-08-05 | 2019-11-29 | 广东工业大学 | 一种高韧性高耐磨性的高熵陶瓷及其制备方法和应用 |
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