欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以超重力辅助燃烧合成熔渗工艺制备了具有梯度特征的WC—Ni硬质合金材料。该工艺以铝热反应为基础，施加辅助超重力场，制备出具有梯度特征的硬质合金材料。该材料具有双层梯度结构：沿重力场方向依次为Ni金属层和WC—Ni硬质合金层。其中Ni金属层的硬度值为72HRA；硬质合金层的硬度值最高为87HRA。Ni熔体在熔渗过程中的搅动使WC在Ni金属层出现弥散分布并导致硬质合金层WC的长大。熔体由底层开始向顶层逐渐凝固的特点使该梯度材料抗弯强度降低。
英文摘要：
Gradient WC Ni cemented carbide materials were prepared by high-gravity-assisted combustion syn thesis and infiltration, where Ni melt was in situ synthesized and then infiltrated into porous compacts of WC powder. The obtained materials consisted of two layers and showed a gradient feature along the high-gravity direction, in which the upper layer was Ni metal and the under layer was WC Ni cemented carbide. The hardness of the Ni metal and WC-Ni cemented carbide reached 72 HRA and 87 HRA, respectively. The agitation of Ni melt during infiltration resulted in the presence of WC particles in the Ni metal and growth of WC grains in the cemented carbide layer. The WC-Ni cemented carbide materials showed a relatively low bending strength of 770 MPa, which may be connected with the down-to-up solidification kinetics.
同期刊论文项目
同项目期刊论文
Effects of temperature and holding time on bonding W and W–Cu composites with an amorphous W–Fe coat
High-gravity combustion synthesis and in situ melt infiltration: A new method for preparing cemented
Melt-casting of Y3Al5O12 (YAG) ceramics by combustion synthesis under high gravity with the addition
Facile thermal explosion synthesis and optical properties of Al-doped flatted 3C-SiC microcrystals w
Combustion synthesis of (TiC plus SiC) composite powders by coupling strong and weak exothermic reac
Fabrication of nanostructure Al2O3/ZrO2 (Y2O3) eutectic by combustion synthesis melt-casting under u
Investigation of isothermal and no-isothermal oxidation of SiC powder using an analytic kinetic mode
Highly dense beta-SiC ceramics with submicron grains prepared by sintering of nanocrystalline powder
Fast fabrication of W–Cu functionally graded material by high-gravity combustion synthesis and melt-
Fabrication of Ni/WC composite with two distinct layers through centrifugal infiltration combined wi
Optical and mechanical properties of amorphous bulk and eutectic ceramics in the HfO2-Al2O3-Y2O3 sys
In suit synthesis and bonding of Cu to W–Cu composite by combustion synthesis and centrifugal infilt
Fabrication of Cu-riched W–Cu composites by combustion synthesis and melt-infiltration in ultrahigh-
Optical and mechanical properties of amorphous bulk and eutectic ceramics in the HfO2–Al2O3–Y2O3 sys
Effects of temperature and holding time on bonding W and W-Cu composites with an amorphous W-Fe coat
期刊信息
位置：