CN110282982B - 一种Ti(C,N)/AlN复合粉体及其制备方法 - Google Patents

一种Ti(C,N)/AlN复合粉体及其制备方法 Download PDF

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CN110282982B
CN110282982B CN201910585015.1A CN201910585015A CN110282982B CN 110282982 B CN110282982 B CN 110282982B CN 201910585015 A CN201910585015 A CN 201910585015A CN 110282982 B CN110282982 B CN 110282982B
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余超
艾俊迪
邓承继
丁军
祝洪喜
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Wuhan University of Science and Engineering WUSE
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Abstract

本发明涉及一种Ti(C,N)/AlN复合粉体及其制备方法。其技术方案是：将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至900～1600℃，保温0.5～3h，冷却至室温，制得Ti(C,N)/AlN复合粉体。所述Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～2μm，长度为1～10μm；所述Ti(C,N)颗粒的粒径为10～80μm。所述Ti2AlC3粉体的纯度≥98.0wt％，Ti2AlC3粉体的粒径为10～100μm。本发明具有工艺简单和生产成本低的特点，所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒与AlN晶须结合性好、物相纯度高、AlN分布均匀和综合性能优异，有利于推广应用。

Description

一种Ti(C,N)/AlN复合粉体及其制备方法
技术领域
本发明属于陶瓷粉末制备技术领域。具体涉及一种Ti(C,N)/AlN复合粉体及其制备方法。
背景技术
Ti(C,N)基金属陶瓷具有耐磨性好、高温硬度大、化学性稳定和抗热变形性优异等，已成为切割行业中的新生材料。AlN具有热导率高、热膨胀系数低、强度高和光电磁性能优良的性质，广泛用作新型复合材料的增强体。通过向Ti(C,N)中添加AlN能有效增加氮含量，Al可以通过固溶强化使Ti(C,N)相粘结。因此，添加AlN将进一步改善Ti(C,N)的微观结构和力学性能。
Zhou W等人(Zhou W,Zheng Y,Zhao Y,et al.Microstructurecharacterization and mechanical properties of Ti(C,N)-based cermets with AlNaddition[J].Ceramics International,2015,41(3):5010-5016.)以TiC0.6N0.4、WC、Mo、Ni、C和Cr3C2粉末为原料，添加AlN，以乙醇为溶剂混合均匀，在红外炉中干燥，采用真空烧结法升温至1400℃并保温1h，制得Ti(C,N)-AlN复合材料，但该方法反应过程难以控制，且无法制备纯相复合材料，材料性能较差。
Lv C等人(Lv C,Zhai Y,Wang C,et al.Hot-Press Sintering of TiC0.5N 0.5-Based Cermets:Addition Effect of AlN Nano-Powder on Microstructure andMechanical Properties[J].Key Engineering Materials,2017,726.)以TiC0.5N 0.5和AlN为原料，以Mo、Ni、WC和Co为添加剂，通过超声波振动和机械搅拌，真空干燥；再采用热压烧结法以40Mpa和15℃/min升温至1450℃。制得Ti(C0.7N0.3)AlN复合材料，该方法制备过程复杂，需要在一定压力下反应，生产成本较高。
Xiong J等人(Xiong J,Guo Z,Shen B,et al.The effect of WC,Mo2C,TaCcontent on the microstructure and properties of ultra-fine TiC0.7N0.3cermet[J].Materials&design,2007,28(5):1689-1694.)以TiC0.7N0.3为原料，以WC、Mo2C、TaC粉末为添加剂，用研磨机研磨48h，加入蜡作为压制助剂，压制成型，采用真空烧结法烧结，然后在热等静压机进行HIP处理，虽制得Ti(C,N)复合材料。但该方法工艺复杂，生产成本较高，综合性能较差。
发明内容
本发明旨在克服现有技术缺陷，目的是提供一种工艺简单和生产成本低的Ti(C,N)/AlN复合粉体的制备方法，用该方法制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒与AlN晶须结合性好、物相纯度高、AlN分布均匀和综合性能优异。
为实现上述目的，本发明所采用的技术方案的是：将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至900～1600℃，保温0.5～3h，冷却至室温，制得Ti(C,N)/AlN复合粉体。所述Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～2μm，长度为1～10μm；所述Ti(C,N)颗粒的粒径为10～80μm。
所述Ti2AlC3粉体的纯度≥98.0wt％，Ti2AlC3粉体的粒径为10～100μm。
所述氮气的纯度≥98％。
由于采用上述技术方案，本发明与现有技术相比具有如下积极效果：
本发明将Ti2AlC3粉体装入气氛炉中，在氮气气氛和900～1600℃条件下保温0.5～3h，冷却至室温，即制得Ti(C,N)/AlN复合粉体。整个工艺流程紧凑，制备方法简单，不需要催化剂和模板，生产成本低且无污染。
本发明制备的Ti(C,N)/AlN复合粉体中的AlN晶须均匀覆盖在Ti(C,N)颗粒表面，Ti(C,N)颗粒与AlN晶须结合性好；AlN晶须直径为0.010～2μm，长度为1～10μm。由于AlN晶须的长度和直径的增长，能更好的增加Ti(C,N)粉体的机械强度和化学稳定性。
本发明制备的Ti(C,N)/AlN复合粉体纯度高，制备的Ti(C,N)/AlN复合粉体粒径为微米至纳米级别，有利于改善加Ti(C,N)复合粉体的稳定性和物理性能。
本发明由于AlN结合提高了Ti(C,N)金属陶瓷基体的韧性和耐磨性。制备的Ti(C,N)/AlN复合粉体可用于制备性能优异的金属陶瓷、耐高温耐磨损的表面涂层，用Ti(C,N)/AlN复合粉体制备的刀具适用于金属表面精加工、金属切割和高精度尺寸控制。
因此，本发明具有工艺简单和生产成本低的特点，所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒与AlN晶须结合性好、物相纯度高、AlN分布均匀和综合性能优异，有利于推广应用。
附图说明
图1为本发明制备的一种Ti(C,N)/AlN复合粉体的SEM图.
具体实施方案
下面对具体实施方式对本发明作进一步描述，并非对其保护范围的限制。
本具体实施方式中：
所述Ti2AlC3粉体的纯度≥98.0wt％，Ti2AlC3粉体的粒径为10～100μm。
所述氮气的纯度≥98％。
实施例中不再赘述。
实施例1
一种Ti(C,N)/AlN复合粉体及其制备方法。本实施例所述制备方法是：
将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至900～1300℃，保温2～3h，冷却至室温，制得Ti(C,N)/AlN复合粉体。
本实施例所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～1.00μm，长度为1～5μm；所述Ti(C,N)颗粒的粒径为10～80μm。
实施例2
一种Ti(C,N)/AlN复合粉体及其制备方法。本实施例所述制备方法是：
将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至1100～1400℃，保温1～2h，冷却至室温，制得Ti(C,N)/AlN复合粉体。
本实施例所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～1μm，长度为1～7μm；所述Ti(C,N)颗粒的粒径为10～80μm。
实施例3
一种Ti(C,N)/AlN复合粉体及其制备方法。本实施例所述制备方法是：
将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至1200～1600℃，保温0.5～1h，冷却至室温，制得Ti(C,N)/AlN复合粉体。
本实施例所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～2μm，长度为1～10μm；所述Ti(C,N)颗粒的粒径为10～80μm。
本具体实施方式与现有技术相比具有如下积极效果：
本具体实施方式将Ti2AlC3粉体装入气氛炉中，在氮气气氛和900～1600℃条件下保温0.5～3h，冷却至室温，即制得Ti(C,N)/AlN复合粉体。整个工艺流程紧凑，制备方法简单，不需要催化剂和模板，生产成本低且无污染。
本具体实施方式制备的Ti(C,N)/AlN复合粉体如附图所示，图1是实施例1制备的一种Ti(C,N)/AlN复合粉体的SEM图。从图1可以看出：所制备的Ti(C,N)/AlN复合粉体没有任何杂质污染，AlN晶须直径为0.010～1μm；长度为1～5μm。本具体实施方式制备的Ti(C,N)/AlN复合粉体中的AlN晶须亦均匀覆盖在Ti(C,N)颗粒表面，Ti(C,N)颗粒与AlN晶须结合性好；AlN晶须直径为0.010～2μm，长度为1～10μm。由于AlN晶须的长度和直径的增长，能更好的增加Ti(C,N)粉体的机械强度和化学稳定性。
本具体实施方式制备的Ti(C,N)/AlN复合粉体纯度高，制备的Ti(C,N)/AlN复合粉体粒径为微米至纳米级别，有利于改善加Ti(C,N)复合粉体的稳定性和物理性能。
本具体实施方式由于AlN结合提高了Ti(C,N)金属陶瓷基体的韧性和耐磨性。制备的Ti(C,N)/AlN复合粉体可用于制备性能优异的金属陶瓷、耐高温耐磨损的表面涂层，用Ti(C,N)/AlN复合粉体制备的刀具适用于金属表面精加工、金属切割和高精度尺寸控制。
因此，本具体实施方式具有工艺简单和生产成本低的特点，所制备的Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒与AlN晶须结合性好、物相纯度高、AlN分布均匀和综合性能优异，有利于推广应用。

Claims (4)

1.一种Ti(C,N)/AlN复合粉体的制备方法，其特征在于所述制备方法是：将Ti2AlC3粉体装入石墨坩埚内，再将所述石墨坩埚置入气氛炉中，在氮气气氛条件下升温至900～1600℃，保温0.5～3h，冷却至室温，制得Ti(C,N)/AlN复合粉体。
2.根据权利要求1所述Ti(C,N)/AlN复合粉体的制备方法，其特征在于所述Ti2AlC3粉体的纯度≥98.0wt％，Ti2AlC3粉体的粒径为10～100μm。
3.根据权利要求1所述Ti(C,N)/AlN复合粉体的制备方法，其特征在于所述氮气的纯度≥98％。
4.一种Ti(C,N)/AlN复合粉体，其特征在于所述Ti(C,N)/AlN复合粉体是根据权利要求1～3项中任一项所述Ti(C,N)/AlN复合粉体的制备方法所制备的Ti(C,N)/AlN复合粉体；
所述Ti(C,N)/AlN复合粉体中的Ti(C,N)颗粒表面覆盖有AlN晶须；所述AlN晶须直径为0.010～2μm，长度为1～10μm；所述Ti(C,N)颗粒的粒径为10～80μm。
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