Effects of MgO addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with CeO2 (ZTA–CeO2) ceramic composite by Rejab, Nik Akmar, Ahmad Azhar, Ahmad Zahirani, Khoo, Seng Kian, Ratnam, Mani Maran, Ahmad, Zainal Arifin

“…The pellets were sintered at 1600 °C for 4 h under pressureless condition. Vickers hardness and fracture toughness of the sintered samples were measured using the Vickers indentation method. …”
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Synthesis of high fracture toughness of hydroxyapatite bioceramics by Tan, Chou Yong, Singh, Ramesh, Ranna, Tolouei, Iis, Sopyan, Teng, Wan Dung

“…Similar results were observed for its stiffness and Vickers hardness. Nevertheless, the fracture toughness of HA was greatly enhanced by the incorporation of 5 wt% MgO. …”
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Influence of Manganes Doping into HA Powders on the properties of its Dense Bodies by A N, Natasha, Sopyan, Iis, Mel, Maizirwan, S., Ramesh

“…The effect of Manganese (Mn) addition on the Vickers hardness and relative density of nanocrystalline hydroxyapatite (HA) dense bodies were studied. …”
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Sintering behavior of hydroxyapatite ceramics prepared by different routes by Chou Yong, Tan, Singh, Ramesh, Khai Liang, Aw, Wei Hong, Yeo, Sopyan, Iis, Wan Dung, Teng

“…The optimum sintering temperature for the synthesized HA(W) was 1100°C with the following properties being recorded: 99.8% relative density, Vickers hardness of 7.04 GPa and fracture toughness of 1.22 MPam½. …”
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Sintering behaviour of hydroxyapatite prepared from different routes by S., Ramesh, C.Y., Tan, Ranna, Tolouei, M., Amiriyan, J. , Purbolaksono, Iis, Sopyan, W.D., Teng

“…The optimum sintering temperature for the HA(W) samples was 1100 °C with the following properties being recorded: 99.8% relative density, Vickers hardness of 7.04 GPa and fracture toughness of 1.22 MPa m1/2. …”
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Influence of head-tip morphology on contact properties for microconnector of Ni–Co alloy by Bhuiyan, M. M. I., Quadri, H. A., Bhuiyan, Moinul, Kajihara, M.

“…Among these alloys, the Vickers hardness is HV = 510, 518, 525 and 478 for y = 0.178, 0.204, 0.233 and 0.299, respectively. …”
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Investigations of the effects of initial Zn concentration and sintering conditions on the phase behavior and mechanical properties of Zn-doped bcp by -, Gunawan, Sopyan, Iis, Mel, Maizirwan, -, Suryanto

“…The dense samples were studied in terms of phase stability, relative density, Vickers hardness, and fracture toughness. The results showed hydroxyapatite as the main phase and β-tricalcium phosphate as the secondary phase. …”
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Effects of powder synthesis method on the sinterability of hydroxyapatite by K. L., Aw, Ranna, Tolouei, Singh, Ramesh, Tan, Chou Yong, W,, H. Yeo, H., Kelvin, Iis, Sopyan, Teng, Wan Dung

“…Further increased in sintering temperature resulted in the decreased of Vicker’s hardness. Moreover, the HAp samples reached a maximum fracture toughness of ~0.9 MPam1/2 at 1050oC while the HAwm attained maximum KIc of only ~0.7 MPam1/2 at 1300oC. …”
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Preparation of zinc doped-biphasic calcium phosphate/carbon nanotube composites by -, Gunawan, Sopyan, Iis, Mel, Maizirwan, -, Suryanto

“…The samples were studied in terms of the phase stability, relative density, Vickers hardness, and fracture toughness as well as in vitro analysis in SBF solution. …”
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Preparation of Dense Biphasic Calcium Phosphate Ceramics using Eggshell Derived Nanopowders by Iis, Sopyan, S.A. , Mohamad, S. F., Adlina

“…The effects of sintering temperature and compaction condition on mechanical properties of dense bodies were investigated in terms of compressive strength and Vickers hardness.…”
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Investigation of recast layer of non-conductive ceramic due to micro-EDM by Mohamed, Abd. Rahman, Asfana, Banu, Ali, Mohammad Yeakub

“…The recast layer thickness was observed using scanning electron microscope and its hardness was measured using micro-Vickers hardness tester. The hardness data were analyzed and an empirical model was developed. …”
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Effect of nano silica on the sinterability of hydroxyapatite dense bodies by Ranna, Tolouei, C.Y., Tan, S., Ramesh, Iis, Sopyan, W.D., Teng

“…In agreement with the bulk density trend, the increasing silica additives in HA depleted the Young’s modulus and Vickers hardness of the HA body. The study revealed that the addition of silica have an adverse effect on the sintered properties of hydroxyapatite bioceramics.…”
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Fabrication of CuSiC composite by powder metallurgy route by A. R. , Fatimah Azreen, Sutjipto, Agus Geter Edy, Adesta, Erry Yulian Triblas

“…The density of the composite decrease with increasing SiCf and density as high as 87% for 10vol% SiCf/Cu matrix sintered at 800°C had been achieved. The Vickers hardness of 774MPa also had been achieved for 10vol% SiCf/Cu matrix but sintered at 900°C. …”
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Processing of TiC-CNT hybrid composite coating on low alloy steel using TIG Torch technique by Maleque, Md. Abdul, Bello, K. A, Md Idriss, Ahmed Nazrin, Mirdha, S.

“…The microstructural and microhardness characteristics of the processed composites coating were analyzed using SEM, EDXand Vickers microhardness testers. Under the melting condition used in this investigation, the arc completely dissolved the composite powder mixture that resolidifiedinto a melt track with radial marks and smooth surfaces. …”
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Effects of bismuth oxide on the properties of calcium phosphate bioceramics by W., H. Yeo, Singh, Ramesh, Tan, Chou Yong, Aw, K. L., Ranna, Tolouei, H., Kelvin, Iis, Sopyan, Teng, Wan Dung, Hoque, Md Enamul

“…In general, HA containing 0.5 wt% of Bi2O3 and when sintered at 1000oC was found to be beneficial in enhancing densification, Young’s modulus, Vickers hardness and fracture toughness. Throughout the sintering regime, the highest value of relative bulk density of 98.7% was obtained for 0.5 wt% Bi2O3-doped HA when sintered at 1000oC. …”
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