查询词典 diamond boron

Ballistics experts in recent years have puzzled over a troubling loss of impact resistance in boron carbide, sometimes used in protective armour.

近几年来，导弹专家对用于保持性盔甲上的碳化硼保护层易碎的原因一直感到迷惑不解。

Following the choice of the materials, taking ZL205A alloy as the matrix and boron carbide as the reinforcement, the experiment was carried out in air by the stir-furnace.

经过广泛调研和充分的论证，本研究选取ZL205A合金作为基体，碳化硼颗粒作为增强体，采用搅拌复合的方法在空气状态下制备出用于实验的复合材料。

The reunion reason of boron carbide submicron powders in manufacturing process was analyzed, spray drying and airflow crash were adopted to deal with the materials.

对碳化硼超细微粉在干燥时的硬团聚现象进行了分析，并分别来用喷雾干燥和气流破碎两种方法对物料进行处理。

Description :The new Tungsten based IF material has up to twice the strength of the best impact resistant materials currently used in protective armor applications such as boron carbide and silicon carbide, and are over 5 times stronger than steel.

描述：基于 IF 材料的新钨比现有使用的保护装甲材料如碳化硼和金刚砂拥有两倍的最好冲撞抵抗效果，是钢强度的五倍以上。

Boron carbide,friction coefficient,wear rate,tribochemical reaction

碳化硼-碳化硼摩擦副的摩擦磨损特性研究。

Description :The new Tungsten based IF material has up to twice thestrength of the best impact resistant materials currently used inprotective armor applications such as boron carbide and siliconcarbide, and are over 5 times stronger than steel.

描述：基於IF 材料的新钨比现有使用的保护装甲材料如碳化硼和金刚砂拥有两倍的最好冲撞抵抗效果，是钢强度的五倍以上。

According to this point it has good ability to absorb neutron and resist eradiation.Because of their high hardness and strength, excellent wear and corrosion, low density, low friction coefficient good self-lubricate and high temperature properties both silicon carbide and boron carbide components have been widely used in many industries.

由于碳化硼中的B14中子缺失，它还具有较大的热中子俘获截面，具有极好的中子吸收和抗辐射性能，由于其具有耐高温，耐酸碱腐蚀，高强度，高化学稳定性，比重轻，半导体等特点而成为众多行业的首选材料。

Production of small special-shaped wheel specifications, high-precision Whetstone, boron carbide, natural jade, agate, rubies, and so I plant "high-quality products."

生产的小规格异型砂轮、高精度油石、碳化硼、天然玉、玛瑙、红宝石等为我厂"拳头产品"。

Artificial SiC: black silicon carbon, green silicon carbon, cerium silicon carbide, boron carbide

sup2；人造碳化硅：黑碳硅、绿碳硅、铈碳化硅、碳化硼

For a certain hot-pressing conditions, relative density, flexural strength and fracture toughness of the materials hot-pressed from boron carbide powder with 7wt%carbon are 98.5%, 460 MPa and 7.65 MPa*m1／2,respectively.

结果表明：在一定的热压条件下，添加7％C的碳化硼烧结体的相对密度可高达98.5％，断裂韧性为7.65 MPa*m1／2，弯曲强度仍能达460 MPa。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044