[1]卢红霞,高凯,李明亮,等.以高炉渣为助烧剂制备ZTA/TiC复合陶瓷及其性能研究[J].郑州大学学报(工学版),2020,41(05):8-14.
　LU Hongxia,GAO Kai,LI Mingliang,et al.Preparation of ZTA/TiC Composite Ceramics Using Blast Furnace Slag as Sintering Aid[J].Journal of Zhengzhou University (Engineering Science),2020,41(05):8-14.
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以高炉渣为助烧剂制备ZTA/TiC复合陶瓷及其性能研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41卷
期数:
2020年05期
页码:
8-14
栏目:
出版日期:
2020-10-01

文章信息/Info

Title:
Preparation of ZTA/TiC Composite Ceramics Using Blast Furnace Slag as Sintering Aid
作者:
卢红霞; 高凯; 李明亮; 王海龙
Author(s):
LU Hongxia1; 2;  GAO Kai2;  LI Mingliang1;  WANG Hailong1; 2
1.School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; 2.Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, China
Keywords:
ZTA/TiC composite ceramics;  blast furnace slag;  crystallization;  low temperature sintering;  mechanical properties
文献标志码:
A
摘要:
以3μm α -Al 2 0 3 为主要原料,辅以纳米Al 2 0 3 、ZrO 2 ,和TiC等原料,工业废渣一高炉渣为助烧剂,热压烧结制备ZTA/TiC复合陶瓷。利用XRF、XRD、DSC、SEM、三点弯曲试验和维氏压痕等表征手段,研究了原料组成和烧结温度对复合陶瓷物相组成、微观结构及力学性能的影响。结果表明:15%(质量分数,下同)纳米Al 2 0 3 及5%纳米TiC的加入有利于复合陶瓷力学性能的提升,烧结温度为1650 ℃ 时,材料的抗弯强度和断裂韧性分别为510MPa和6.58MPa.m 1/2 ,沿晶断裂与穿晶断裂同时存在,使复合陶瓷有较好的综合性能。添加质量分数为4%的高炉渣，1550 ℃ 热压烧结30min,得到的ZTA/TiC复合陶瓷相对密度为99.5%,抗弯强度和断裂韧性分别为555MPa和5.20MPa.m 1/2 ",比相同温度下未添加高炉渣时的性能优良。烧结时高炉渣产生的液相可促进Al 2 0 3 棒晶生长并降低烧结温度;同时由于其析晶特性,陶瓷基体中的玻璃相减少,陶瓷强度提高。
Abstract:
ZTA/TiC composite ceramics were prepared by using 3 μm α-Al2O3 particles as main raw material, supplemented by nano-materials such as Al2O3, ZrO2 and TiC, and industrial waste residue (blast furnace slag) used as sintering aid. The effects of raw material composition and sintering temperature on the phase composition, microstructure and mechanical properties of the materials were studied by X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscope (SEM), three-point bending test and Vickers indentation, respectively. The results showed that addition of 15% nano-Al2O3 and 5% nano-TiC was beneficial to the improvement of the mechanical properties of the composite ceramics. Flexural strength and fracture toughness of such composites sintered at 1 650 ℃ reached 510 MPa and 6.58 MPa·m 1/2, respectively. Existence of intergranular fracture and transgranular fracture led to composite ceramics possessing better comprehensive properties. When the content of blast furnace slag was 4%, the relative density of samples sintered at 1 550 ℃ for 30 min reached 99.5%, and flexural strength and fracture toughness were 555 MPa and 5.20 MPa·m1/2, respectively. Liquid phase produced by blast furnace slag in the sintering process promoted growth of Al2O3 rods and decreased sintering temperature. Furthermore, content of glass phase in the ceramic matrix decreased and ceramic strength increased due to crystallization characteristics of blast furnace slag.

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更新日期/Last Update: 2020-10-23