**High-performance Self-lubricating Ceramic Composites with Laminated-graded Structure**

Yongsheng Zhang, Yunfeng Su, Yuan Fang, Yae Qi and Litian Hu

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/62538

#### **Abstract**

[10] Ullmann A, Kalman H: Efficiency and optimized dimensions of annular fins of differ‐ ent cross-section shapes. International Journal of Heat and Mass Transfer. 1989;32:1105.

[11] Dhar PL, Arora CP: Optimum design of finned surfaces. J. Franklin Inst. Category: Fluid

[12] Mikk I: Efficiency of convective round fins with a triangular profile. Journal of Engineer‐

[13] Mikk I: Convective fin of minimum mass. International Journal of Heat and Mass

[14] Arauzo I, Campo A, Cortes C: Quick estimate of the heat transfer characteristics of annular fins of hyperbolic profile with the power series method. Applied Thermal

[15] Arslanturk C: Simple correlation equations for optimum design of annular fins with uniform thickness. Journal of Applied Thermal Engineering. 2005;25:2463–2468. [16] Kundu B, Das PK: Performance analysis and optimization of annular fin with a step

[17] Aziz A, Rahman MM: Thermal performance of a functionally graded radial fin. Interna‐

[18] Acosta-Iborra A, Campo A: Approximate analytic temperature distribution and efficiency for annular fins of uniform thickness. International Journal of Thermal

[19] Kang HS: Optimization of a rectangular profile annular fin based on fixed fin height.

[20] Goupee AJ, Vel SS: Multi-objective optimization of functionally graded materials with temperature-dependent material properties. Materials & Design 2007;28:1861–1879. [21] Aziz A, Fang T: Alternative solutions for longitudinal fins of rectangular, trapezoidal, and concave parabolic profile. Energy Conversion and Management 2010;51:2188–2194.

[22] Aziz A, Khani F: Analytic solutions for a rotating radial fin of rectangular and various convex parabolic profiles. Communication in Nonlinear Science and Numerical

[23] Nagarani N. Experimental heat transfer analysis on annular circular and elliptical fins. International Journal of Engineering Sciences and Technology. 2010;2:2839–2845. [24] Aziz A, Fang T: Thermal analysis of an annular fin with (a) simultaneously imposed base temperature and base heat flux and (b) fixed base and tip temperatures. Energy Conver‐

change in thickness. ASME Journal of Heat Transfer. 2001;123:601–604.

Journal of Mechanical Science and Technology 2009;23:3124–3131.

tional Journal of Thermophysics 2009;30:1637–1648.

Mechanics and Heat Transfer. 1976;301:379–392.

ing Physics. 1977;32:703–707.

60 Advances in Functionally Graded Materials and Structures

Engineering 2005;25:623–634.

Sciences. 2009;48:773-780(2009).

Simulation. 2010;15:1565–1574.

sion and Management 2011;52:2467-2478(2011).

Transfer 1980;23:707–711.

High-performance ceramic composites are potential candidates for the application of wear-resistance components because of their excellent properties. Nevertheless, many problems, such as high friction coefficient of ceramic material and poor mechanical prop‐ erties of ceramic-matrix self-lubricating composites, limit a wider range of applications of these composites in tribological areas. Therefore, improving high-toughness ceramic-ma‐ trix self-lubricating materials for practical applications is significant. This study proposes a new design for ceramic self-lubricating composites to overcome the conflict between their mechanical and tribological properties. Complying with the design principle of bi‐ onic and graded composites, two kinds of self-lubricating ceramic composites with lami‐ nated-graded structure were prepared, and their mechanical and tribological properties were studied. The results show that this newly developed ceramic composite has ach‐ ieved satisfactory strength and tribological properties compared with the traditional ce‐ ramic self-lubricating composites. The bending strength reached the same level as the properties of general monolithic ceramics. In the temperature range of 25-800 °C, the fric‐ tion coefficient of composites was less than 0.55, which was about half of that of mono‐ lithic ceramics.

**Keywords:** Functionally graded material, Laminated structures, Ceramic, High tempera‐ ture, Self-lubricating
