Solid Particle Erosion Behavior of 3YSZ Ceramics at Elevated Temperatures

2011 ◽  
Vol 492 ◽  
pp. 85-88 ◽  
Author(s):  
Feng Jiao Liu ◽  
Ming Hao Fang ◽  
Xiao Jun Wang ◽  
Yan Gai Liu ◽  
Zhao Hui Huang

Solid particle erosion wear behavior of 3YSZ ceramics were performed by self-designed sand blasting type high-temperature solid particle erosion wear equipment, using 36#corundum as abrasive particles. 3YSZ ceramics were pressureless sintered in air atmosphere at 1500°C for 3h. The fracture toughness and Vickers hardness could achieve 10.3 MPa•m1/2and 12.8 GPa, respectively. The effect of temperature (25°C, 400°C, 600°C, 800°C, 1000°C) and the total weight of the abrasive particles (300g, 900g, 1800g) at room temperature on the erosion wear of 3YSZ ceramic were investigated. The volume erosion rate raised and developed a nonlinear dependence on the weight of corundum abrasive particles at room temperature. The slope of the curve decreased gradually. At elevated temperature, volume erosion rate increased as the temperature went up. Nonlinear fitting presents the relationship between the volume erosion rate of 3YSZ ceramics and the corresponding temperature. Plastic deformation is the major erosion mechanism at room temperature when the weight of corundum particles was 300g and 900g. Minor chipping instead of it when the temperature grew up to 400 and 600°C or the corundum particles was as much as 1800g at 25°C. When 3YSZ targets were eroded at 800°C and 1000°C, the material removal are mainly attributed to lateral cracks for an ideally brittle material. Crack propagation is the controlling factor of volume erosion rate.

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaochao Li ◽  
Shusen Chen ◽  
Zhaohui Huang ◽  
Minghao Fang ◽  
Yan’gai Liu ◽  
...  

Solid particle erosion-wear experiments on as-prepared mullite-SiC composite refractories by nitriding reactive sintering were performed at elevated temperatures, using sharp black SiC abrasive particles at an impact speed of 50 m/s and the impact angle of 90° in the air atmosphere. The effects of silicon powder addition and erosion temperature on the erosion-wear resistance of mullite-SiC composite refractories were studied. The test results reveal that Si powders caused nitriding reaction to formβ-sialon whiskers in the matrix of mullite-SiC composite refractories. The erosion-wear resistance of mullite-SiC composite refractories was improved with the increase of silicon powder addition and erosion temperature, and the minimum volume erosion rate was under the condition of 12% silicon added and a temperature of 1400°C. The major erosion-wear mechanisms of mullite-SiC composite refractories were brittle erosion at the erosion temperature from room temperature to 1000°C and then plastic deformation from 1200°C to 1400°C.


2012 ◽  
Vol 512-515 ◽  
pp. 451-454 ◽  
Author(s):  
Feng Jiao Liu ◽  
Ming Hao Fang ◽  
Yan Gai Liu ◽  
Zhao Hui Huang

The erosion wear resistance of YSZ ceramics is worth studying because solid particle erosion is one of the main causes of destroying the materials and apparatuses. In this paper, 8YSZ ceramics reinforced by NiCr alloy and Al2O3 particles were pressureless sintered at an optimized sintering condition. The facture toughness reached a maximum value of 4.6 MPa•m 1/2 when the addition of NiCr alloy is 12 vol.%, which was much higher than that of the pure 8YSZ ceramic (2.0 MPa•m 1/2) fabricated in the same condition. Solid particle erosion wear behavior of NiCr-Al2O3-ZrO2 (8Y) ceramics composites was performed by self-designed sand blasting type solid particle erosion wear equipment, using 36# SiC particles as abrasive particles with the 90o erosion angle. The effect of the volume addition of NiCr alloy on the erosion wear of NiCr-Al2O3-ZrO2 (8Y) ceramic composites at room temperature was investigated. The results show that the volume erosion rate of the ceramic composites decreased as the volume addition of the NiCr alloy increasing. Crossing cracks, plastic deformation and minor chipping are the major erosion mechanisms.


2021 ◽  
pp. 152808372110642
Author(s):  
Sachin Tejyan

Abrasive particle-induced erosive wear of polymeric engineering components is a major industrial issue. The research of solid particle erosion characteristics of polymeric composites becomes essential due to operational needs in dusty conditions. Nonwovens are now employed in industrial applications for polymeric composites. Nonwoven products are made from a wide range of raw materials, ranging from synthetic to natural fibers. This work finding the effect of nonwoven cotton fiber (5, 10, and 15 wt.%) loading on the physical, mechanical, and erosion wear of fixed wooden dust (4 wt.%) filled hybrid epoxy composites. Experimental results reveal improved impact strength, hardness, and compressive and tensile strength with an increment of fiber loading from 5–15 wt.%. The density of the composites was found to increase, whereas void content decreases with an increase in cotton fiber. The erosion wear of the composites has been studied using an L27 orthogonal array to assess the effects of various parameters such as fiber loading, erodent size, impact velocity, impingement angle, and stand-off distance. The erosion wear increased with impact velocity and remained highest for 60° of impingement angle. The most significant parameter affecting the erosion wear was determined as impact velocity followed by impingement angle. Surface morphologies of eroded samples reveal the fiber pull-out, and fiber breakage was the prominent phenomenon for the erosion wear of the evaluated composites.


Author(s):  
Bijan Mohammadi ◽  
AmirSajjad Khoddami

Solid particle erosion is one of the main failure mechanisms of a compressor blade. Thus, characterization of this damage mode is very important in life assessment of the compressor. Since experimental study of solid particle erosion needs special methods and equipment, it is necessary to develop erosion computer models. This study presents a coupled temperature–displacement finite element model to investigate damage of a compressor blade due to multiple solid particles erosion. To decrease the computational cost, a representative volume element technique is introduced to simulate simultaneous impact of multiple particles. Blade has been made of Ti-6Al-4V, a ductile titanium-based alloy, which is impacted by alumina particles. Erosion finite element modeling is assumed as a micro-scale impact problem and Johnson–Cook constitutive equations are used to describe Ti-6Al-4V erosive behavior. In regard to a wide variation range in thermal conditions all over the compressor, it is divided into three parts (first stages, middle stages, and last stages) in which each part has an average temperature. Effective parameters on erosive behavior of the blade alloy, such as impact angle, particles velocity, and particles size are studied in these three temperatures. Results show that middle stages are the most critical sites of the compressor in terms of erosion damage. An exponential relation is observed between erosion rate and particles velocity. The dependency of erosion rate on size of particles at high temperatures is indispensable.


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