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SPS反應燒結HfB2復合材料的工藝和性能研究
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作者單位:

1.鄭州大學 材料科學與工程學院;2.鄭州航空工業(yè)管理學院

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國家自然科學基金(51772275)；河南省高?？萍紕?chuàng)新人才(15HASTIT009)；中國博士后科學基金(2016T90677和2014M561997)


Preparation and Properties of HfB2-ZrSi2-SiC Composites Fabricated by Reactive Spark Plasma Sintering
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1.School of Materials Science and Engineering,Zhengzhou University;2.Zhengzhou University of Aeronautics

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    摘要:

    本文針對HfB2陶瓷材料難燒結和韌性差等問題,選擇ZrC粉、Si粉和C粉為燒結助劑,借助ZrC-Si-C間的原位反應生成ZrSi2和SiC,促進HfB2陶瓷的燒結,并提高HfB2陶瓷的綜合力學性能。HfB2與燒結助劑的混合粉體經(jīng)放電等離子燒結(SPS)在1600 ℃保溫10 min和40 MPa的壓力條件下制備出相對密度為96.61%的HfB2-ZrSi2-SiC復合材料,所制樣品的硬度、抗彎強度和斷裂韌性均隨著燒結助劑ZrC-Si-C含量的增加呈現(xiàn)先上升后降低的趨勢。當ZrC-Si-C添加量為10 wt.%時所制備樣品的綜合力學性能最好,其硬度值為26.80±1.2 GPa、抗彎強度為504±40 MPa、斷裂韌性值為4.66±0.21 MPa.m1/2。

    Abstract:

    ZrC, Si and C powders were used as the sintering aids to enhance the densification and the mechanical properties of HfB2, due to the in-situ reaction between ZrC-Si-C at sintering temperature. Dense HfB2-ZrSi2-SiC ceramic composites have been fabricated by reactive spark plasma sintering at 1600 ℃ for 10 min under a pressure of 40 MPa. With the amount of ZrC-Si-C increasing, the Vickers hardness, the flexural strength and fracture toughness of the sintered samples increased first, then decreased. HfB2-10wt.% ZrC-Si-C composites showed the the best comprehensive mechanical properties. The Vickers hardness, flexural strength and fracture toughness of HfB2-10wt.% ZrC-Si-C composites were 26.80±1.2 GPa, 504±40 MPa and 4.66±0.21 MPa.m1/2, respectively.

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馬世晨,趙笑統(tǒng),邵剛,王海龍,許紅亮,盧紅霞,范冰冰,張銳. SPS反應燒結HfB2復合材料的工藝和性能研究[J].稀有金屬材料與工程,2020,49(2):550~554.[Shichen Ma, Xiaotong Zhao, Gang Shao, Hailong Wang, Hongliang Xu, Hongxia Lu, Bingbing Fan, Rui Zhang. Preparation and Properties of HfB2-ZrSi2-SiC Composites Fabricated by Reactive Spark Plasma Sintering[J]. Rare Metal Materials and Engineering,2020,49(2):550~554.]
DOI：10.12442/j. issn.1002-185X. QH20190029

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  • 收稿日期:2019-03-15
  • 最后修改日期:2019-03-15
  • 錄用日期:2019-04-19
  • 在線發(fā)布日期: 2020-03-12
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