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High-toughness ZrN ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramics, and discloses a high-toughness ZrN ceramic as well as a preparation method and application thereof. The method comprises the following steps: oxidizing ZrN powder in air at 250-400 DEG C to form a thin ZrO2 layer on the ZrN surface, and calcining nano Al2O3 powder at 1100-1300 DEG C to obtain dendritic Al2O3 powder; then, the oxidized ZrN powder is mechanically mixed with the dendritic Al2O3 powder, and mixed powder is obtained; and pre-pressing and molding the mixed powder, heating to 1600-1800 DEG C in atmosphere or vacuum, pressurizing to 20-60 MPa, and carrying out hot pressed sintering or spark plasma sintering to obtain the ZrN ceramic. The ZrN ceramic has the density of 97% or above, the toughness of 7-9.3 MPa.m < 1/2 > and the heat conductivity of 8.6-11 W. (m <-1 >. K <-1 >), and can be applied to the field of nuclear energy.
本发明属于陶瓷技术领域，公开了一种高韧性的ZrN陶瓷及其制备方法和应用。该方法是将ZrN粉体在空气中250～400℃氧化，在ZrN表面形成薄的ZrO2层，纳米Al2O3粉体在1100～1300℃煅烧，得到枝状Al2O3粉体；再将氧化后的ZrN粉体与枝状Al2O3粉体机械混合，得到混合粉体；将混合粉体预压成型，在气氛或真空下，升温至1600～1800℃，加压20～60MPa，经热压烧结或放电等离子烧结，制得ZrN陶瓷。该ZrN陶瓷的致密度在97％以上，韧性为7～9.3MPa·m1/2，热导率为8.6～11W·(m‑1·K‑1)，可应用在核能领域中。
High-toughness ZrN ceramic as well as preparation method and application thereof
The invention belongs to the technical field of ceramics, and discloses a high-toughness ZrN ceramic as well as a preparation method and application thereof. The method comprises the following steps: oxidizing ZrN powder in air at 250-400 DEG C to form a thin ZrO2 layer on the ZrN surface, and calcining nano Al2O3 powder at 1100-1300 DEG C to obtain dendritic Al2O3 powder; then, the oxidized ZrN powder is mechanically mixed with the dendritic Al2O3 powder, and mixed powder is obtained; and pre-pressing and molding the mixed powder, heating to 1600-1800 DEG C in atmosphere or vacuum, pressurizing to 20-60 MPa, and carrying out hot pressed sintering or spark plasma sintering to obtain the ZrN ceramic. The ZrN ceramic has the density of 97% or above, the toughness of 7-9.3 MPa.m < 1/2 > and the heat conductivity of 8.6-11 W. (m <-1 >. K <-1 >), and can be applied to the field of nuclear energy.
本发明属于陶瓷技术领域，公开了一种高韧性的ZrN陶瓷及其制备方法和应用。该方法是将ZrN粉体在空气中250～400℃氧化，在ZrN表面形成薄的ZrO2层，纳米Al2O3粉体在1100～1300℃煅烧，得到枝状Al2O3粉体；再将氧化后的ZrN粉体与枝状Al2O3粉体机械混合，得到混合粉体；将混合粉体预压成型，在气氛或真空下，升温至1600～1800℃，加压20～60MPa，经热压烧结或放电等离子烧结，制得ZrN陶瓷。该ZrN陶瓷的致密度在97％以上，韧性为7～9.3MPa·m1/2，热导率为8.6～11W·(m‑1·K‑1)，可应用在核能领域中。
High-toughness ZrN ceramic as well as preparation method and application thereof
一种高韧性的ZrN陶瓷及其制备方法和应用
GUO WEIMING (author) / LIU HONGLAN (author) / LIN HUATAI (author)
2024-03-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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