Spark plasma sintered ZrC-TiC-GNP composites: Solid solution formation and mechanical properties

Microstructure and Properties of h-BN-Reinforced Titanium Alloy Matrix Composite Fabricated with Optimized Spark Plasma Sintering Parameters

“…On the other hand, it can be seen in the same Table 3 that experimental run 3 (A 1 B 3 C 3 D 3 ) sintered at 800 °C temperature, 50 MPa pressure, 300°C/min heating rate and 15 mins holding time that the porosity is highest (5.48%) as revealed by the formation of fused pores and other microstructural changes in Figure 3c which resulted in poor densi cation (94.52%) and relatively low microhardness value (4.58 GPa). Generally, close observations from the results of the Taguchi designed experiment has revealed that the ensuing microstructure, densi cation and hardness results obtained were basically a function of the joint in uence of varying levels of sintering temperature, pressure, heating rate and holding time [39].…”

“…Meanwhile, an improvement of 3.0405 x 10 -4 mm 3 /Nm on wear rate was recorded at the rst experiment and 3.63325 x 10 -4 mm 3 /Nm improvement on wear rate was recorded at the second experiment. The signi cant improvement in the microhardness and wear rate pro les of the synthesized composite con rms that the fabrication of ceramic (hexagonal boron nitride) particulate reinforced titanium matrix composites (TMCs) with superior mechanical and tribological properties bene cial in mechanical components has been achieved by the SPS optimization process [39].…”

“…This outcome can be ascribed to homogeneous matrix-reinforcement powder mixture where the h-BN nanoparticles occupied pores (which usually reduce densi cation) within the titanium alloy matrix and a notable amount of deformation on the composite materials which aided the fragmentation of the surface oxides of the powders and most of the agglomerated particles. Meanwhile, the in uence of the randomized SPS parameters/levels and the strength of the consolidation technique is also thought to have facilitated the strong bond developed between the particles of the powders [39] as seen in Figure 3 (h) where the grains are more re ned, and pores are better lled which gives enough reason for the full densi cation and improved hardness [26]. On the other hand, it can be seen in the same Table 3 that experimental run 3 (A 1 B 3 C 3 D 3 ) sintered at 800 °C temperature, 50 MPa pressure, 300°C/min heating rate and 15 mins holding time that the porosity is highest (5.48%) as revealed by the formation of fused pores and other microstructural changes in Figure 3c which resulted in poor densi cation (94.52%) and relatively low microhardness value (4.58 GPa).…”

Effect of Graphene and Carbon Nanotubes on the Thermal Conductivity of WC–Co Cemented Carbide

“…The specific surface area of monolayer graphene is greater than 380 m 2 /g, and the purity is greater than 90%. The experimental specimens were sintered by spark plasma sintering (SPS) [23] and the composition of the test samples are shown in Table 1. The samples were sintered at 1200 • C for 10 min at a pressure of 80 MPa.…”

Kendi Kendini İyileştirebilen Mühendislik Seramikleri

“…Üretim esnasında seramik matris bünyesine fiber veya viskerlerin (whisker, ince tek kristal yapılı ve yüksek uzunluk/kalınlık oranına sahip fiber takviye elemanı), partiküllerin, nanotüp veya nanoplakaların eklenmesi kırılma tokluğu değerinde bir artışa sebep olmaktadır. Seramik bünyesine eklenen bu takviye fazları, geometri ve karakteristiklerine bağlı olarak farklı mekanizmalarla çatlak ilerlemesini önleyici yani kırılma tokluğunu iyileştirici olarak davranırlar [1][2][3][4][5][6][7][8][9][10][11][12]. Bu mekanizmalar Tablo 1'de özetlenmiştir.…”