2-TiC-(Ti, W)C;復(fù)合陶瓷;自蔓延離心熔鑄;力學(xué)性能;結(jié)構(gòu)轉(zhuǎn)化"/> 4C)體系中引入(WO3+Al)燃燒體系,進而調(diào)整兩體系的比例,采用自蔓延離心熔鑄工藝成功制備出W系列含量的TiB2-TiC-(Ti, W)C復(fù)合陶瓷。XRD、FESEM和XRD結(jié)果顯示：陶瓷基體主要由TiB2、TiC和(Ti, W)C固溶體組成,且隨著W含量的增加,(Ti, W)C固溶體體積分數(shù)增加,而TiB2和TiC體積分數(shù)減少且晶粒逐漸細化,同時,組織分布趨于均勻。力學(xué)性能測試表明,隨著W含量的增加,TiB2-TiC-(Ti, W)C復(fù)合陶瓷的相對密度和維氏硬度呈上升趨勢,而陶瓷的彎曲強度和斷裂韌性先增大后減小,在W含量65%時達到最大值,這是TiB2作為唯一的增強相體積分數(shù)逐漸減少的結(jié)果。"/>

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W含量對自蔓延離心熔鑄TiB2-TiC-(Ti,W)C陶瓷組織性能的影響
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軍械工程學(xué)院,軍械工程學(xué)院,軍械工程學(xué)院,軍械工程學(xué)院,63981部隊

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國家自然科學(xué)基金資助(項目號51072229)


Effects of W content on microstructure and properties of TiB2-TiC-(Ti, W)Ccomposite ceramic prepared by SHS centrifugal casting
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Ordnance Engineering College,Ordnance Engineering College,Ordnance Engineering College,Ordnance Engineering College,Unit No. 63981

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    摘要:

    通過在(Ti+B4C)體系中引入(WO3+Al)燃燒體系,進而調(diào)整兩體系的比例,采用自蔓延離心熔鑄工藝成功制備出W系列含量的TiB2-TiC-(Ti, W)C復(fù)合陶瓷。XRD、FESEM和XRD結(jié)果顯示：陶瓷基體主要由TiB2、TiC和(Ti, W)C固溶體組成,且隨著W含量的增加,(Ti, W)C固溶體體積分數(shù)增加,而TiB2和TiC體積分數(shù)減少且晶粒逐漸細化,同時,組織分布趨于均勻。力學(xué)性能測試表明,隨著W含量的增加,TiB2-TiC-(Ti, W)C復(fù)合陶瓷的相對密度和維氏硬度呈上升趨勢,而陶瓷的彎曲強度和斷裂韌性先增大后減小,在W含量65%時達到最大值,這是TiB2作為唯一的增強相體積分數(shù)逐漸減少的結(jié)果。

    Abstract:

    By introducing (WO3+Al) thermites into the (Ti+B4C) combustion system and adjusting the proportion of two systems, TiB2-TiC-(Ti, W)Ccomposite ceramics with different W mass fraction were prepared by SHS centrifugal casting. XRD, FESEM and EDS results show that the ceramic matrix is mainly composed of TiB2, TiC and (Ti, W)C. As W content increases, volume fraction of (Ti, W)C increases, and volume fraction of TiB2 and TiC decrease. Meanwhile, the grains are fined and distributed uniformly. Mechanical properties tests show that relative density and Vickers hardness of the ceramics are on the rise as W content increases, while, flexural strength and fracture toughness of the ceramics firstly increase and then decrease, and achieve maximum when W content is 65%. This is due to the decrease in volume fraction of TiB2 platelet which is the only reinforced phase of the TiB2-TiC-(Ti, W)Ccomposite ceramic.

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陳 碩,張 龍,趙忠民,婁光普,張 昊. W含量對自蔓延離心熔鑄TiB2-TiC-(Ti, W)C陶瓷組織性能的影響[J].稀有金屬材料與工程,2018,47(6):1931~1935.[Chen Shuo, Zhang Long, Zhao Zhongmin, Lou Guangpu, Zhang Hao. Effects of W content on microstructure and properties of TiB2-TiC-(Ti, W)Ccomposite ceramic prepared by SHS centrifugal casting[J]. Rare Metal Materials and Engineering,2018,47(6):1931~1935.]
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  • 收稿日期:2016-06-03
  • 最后修改日期:2016-07-18
  • 錄用日期:2016-08-18
  • 在線發(fā)布日期: 2018-09-06
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