在23-600°C的温度范围内,NiCrSiB-20%CaF2烧结器的耐磨性
Adam Piasecki1, Mateusz Kotkowiak1, Oleksandr Tisov2
1Faculty of Materials Engineering and Technical Physics, Institute of Materials Science and Engineering, Poznan University of Technology, Jana Pawla II 24, 61-139 Poznan, Poland.
Materials (Basel, Switzerland)
|April 24, 2025
概括
这项研究使用粉末金技术生产了自滑复合材料. 化的添加减少了在高温下的磨损,通过形成一种保护性 tribofilm.
科学领域:
- 材料科学 材料科学 材料科学
- 部落学 (tribology) 是一个学科.
- 机械工程 机械工程
背景情况:
- 自滑复合材料对于减少各种机械应用中的摩擦和磨损至关重要.
- ---- (NiCrSiB) 合金具有良好的耐磨性,但可以从固体滑剂中获益.
- 化 (CaF2) 是一种已知的固体滑剂,具有用于高温应用的潜力.
研究的目的:
- 为了研究NiCrSiB合金复合材料与CaF2添加的tribological行为.
- 评估温度对摩擦和磨损机制的影响.
- 为了描述磨损表面和识别保护性 tribofilm 形成.
主要方法:
- 粉末金技术被用来制造由NiCrSiB矩阵和20% CaF2.2%的复合材料.
- 在室温 (RT),200°C,400°C和600°C下进行了针盘磨损测试.
- 使用光显微镜 (LM),扫描电子显微镜 (SEM),能量分散光谱 (EDS),X射线光电子光谱 (XPS),X射线衍射 (XRD) 和形状测量分析了磨损机制.
主要成果:
- CaF2有效地涂在磨损表面上,特别是在高温下.
- 在RT,磨损主要是由微切割和微耕.
- 随着温度的升高,这些机制减弱,形成了CaF2和氧化物的 tribofilm,减轻了磨损.
结论:
- 将CaF2添加到NiCrSiB合金中可以提高自滑性能.
- 高温会促进保护性 tribofilm 的形成,显著减少磨损.
- 这些复合材料显示出对高温tribological应用的前景.
相关概念视频
Abrasion Resistance of Concrete
80
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
80
Thermal expansion and Thermal stress: Problem Solving
1.1K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.1K
Characteristics of Dry Friction
442
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
442
Rolling Resistance: Problem Solving
268
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
268
Toughness and Hardness of Aggregate
209
Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
209
Yield Criteria for Ductile Materials under Plane Stress
124
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
124


