摘要：目前国内外对于放电等离子烧结技术(SPS技术)的主要应用在于烧结金属陶瓷、复合材料、复合材料陶瓷等众多方面。使用SPS技术来烧结的陶瓷材料致密度高、晶粒细小，很大程度上降低了试样烧结温度及提高了烧结体的致密度，也减短了烧结时间，节约能源。碳氮化钛（TiCN）由于其性能目前已经在市面上引起广泛的关注。与常规碳化钨基材料相比，TiCN基硬质合金具有几个潜在的优点，例如增加的硬度和耐火性，高耐磨性，高边缘强度和边缘锐度。无添加TiCN的陶瓷只能在烧结温度超过2300℃的条件下获得。为了在相对低的烧结温度下烧结无添加剂的TiCN金属陶瓷，可以引入两种方法：使用纳米晶体TiCN粉末并应用先进的烧结方法如放电等离子烧结（SPS）。另外对于无添加剂结剂TiCN的压实，SPS方法可以是非常合适的，具有实现高烧结密度和低晶粒尺寸的显着潜力。本研究的目的是通过SPS方法对TiCN样品的烧结过程进行研究，将结果进行讨论，通过对不同烧结温度的数据进行比较，来讨论不同烧结温度对于TiCN基金属陶瓷的影响。材料性能的未来发展是艰难的,但是成果也会更卓越。本论文会分成两部分分别来介绍放电等离子烧结技术和TiCN金属基陶瓷材料。79593

毕业论文关键词：TiCN基金属陶瓷；SPS；复合材料；粉末烧结；力学性能

Preparation of TiCN Based Cermets by Discharge Plasma Sintering

Abstract: At present both at home and abroad for the discharge plasma sintering technology (SPS technology) is the main application of sintered cermets, composite materials, composite ceramics and many other aspects。 The use of SPS technology to sinter the ceramic material density, grain size, to a large extent reduce the sample sintering temperature and improve the sintered body density, but also shorten the sintering time, saving energy。 Titanium carbonitride (TiCN) has attracted much attention in the market due to its performance。 Compared to conventional tungsten carbide based materials, TiCN based cemented carbide has several potential advantages, such as increased hardness and fire resistance, high abrasion resistance, high edge strength and edge sharpness。 Ceramic without TiCN can only be obtained at a sintering temperature of more than 2300 ° C。 In order to cure the additive-free TiCN cermet at a relatively low sintering temperature, two methods can be introduced using nanocrystalline TiCN powders and applying advanced sintering methods such as spark plasma sintering (SPS)。 In addition to the compaction of the binderless WC, the SPS process may be very suitable and have significant potential to achieve high sintering density and low grain size。The purpose of this study is to study the sintering process of TiCN samples by SPS method。 The results are discussed。 The effects of different sintering temperatures on TiCN-based cermets are discussed by comparing the data of different sintering temperatures。 The future development of material properties is more difficult, but the results will be more excellent。 TiCN-based cermet is based on TiC-based cermet。 This paper will be pided into two parts to introduce the discharge plasma sintering technology and TiCN metal-based ceramic materials respectively。

Key words: SPS; TiCN based cerme; composites; powder sintering; Mechanical properties

目 录

第一章 绪 论 1

1。1 放电等离子烧结技术 1

1。1。1 放电等离子烧结的原理、工艺及特点 2

1。1。2 放电等离子烧结的应用及研究进展 2

1。1。3 使用SPS技术烧结TiCN基金属陶瓷 3

1。2 TiCN金属基陶瓷