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首页> 外文期刊>High temperature materials and processes >Effect of Z Values on the Microstructure and Mechanical Properties of Post-sintered Reaction Bonded β-SiAlON
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Effect of Z Values on the Microstructure and Mechanical Properties of Post-sintered Reaction Bonded β-SiAlON

机译：Z值对β-SiAlON烧结后反应键组织和力学性能的影响

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摘要

β-SiAlON materials with different Z values (Z= 0.5-3) were fabricated by a reaction bonding combining post-sintering route using raw materials of Si, A1_2O_3, A1N, etc. The reaction bonded β-SiAlON (RB-β-SiAlON) were post-sintered at 1,750 ℃ for 6 h. Apparent porosity, bulk density, bending strength and Vicker's hardness of the samples before and after post-sintering were tested. XRD results showed that the phase composition of both RB-β-SiAlON and post-sintered RB-β-SiAlON (PSRB-β-SiAlON) were β-SiAlON. For RB-β-SiAlON, the apparent porosity was decreased with the increase of Z values, while the strength and hardness was increased accordingly. After the post-sintering procedure, nearly full densified PSRB-β-SiAlON was obtained and the mechanical properties were significantly improved. The bending strength and Vicker's hardness of the PSRB-β-SiAlON (Z=0.5) achieved 510 MPa and 16.5 GPa, respectively, which were as 2.7 and 6.7 times high as those of the corresponding RB-β-SiAlON. However, the strength and hardness of PSRB-β-SiAlON decreased with the increase of Z value due to the grain growth.
机译：使用Si，Al_2O_3，AlN等原料通过后烧结结合反应键合，制备出Z值不同（Z = 0.5-3）的β-SiAlON材料。反应键合的β-SiAlON（RB-β-SiAlON） ）在1,750℃下烧结6小时。测试了烧结前后样品的表观孔隙率，堆积密度，弯曲强度和维氏硬度。 XRD结果表明，RB-β-SiAlON和烧结后的RB-β-SiAlON（PSRB-β-SiAlON）的相组成均为β-SiAlON。对于RB-β-SiAlON，随着Z值的增加，表观孔隙率降低，而强度和硬度相应增加。经过烧结后，获得了几乎完全致密的PSRB-β-SiAlON，并且机械性能得到了显着改善。 PSRB-β-SiAlON（Z = 0.5）的抗弯强度和维氏硬度分别达到510 MPa和16.5 GPa，分别是相应RB-β-SiAlON的2.7和6.7倍。然而，由于晶粒长大，PSRB-β-SiAlON的强度和硬度随着Z值的增加而降低。

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  • 来源
    《High temperature materials and processes》 |2017年第5期|453-458|共6页
  • 作者

    Yanjun Li; Donghua Liu; Han Jin; Donghai Ding; Guoqing Xiao; Zhongqi Shi; Zhihao Jin;

  • 作者单位

    College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    SiAlON; reaction bonding; post-sintering; mechanical properties;

    机译：赛隆反应键合烧结后机械性能;

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