Phase composition, microstructure and in vitro bioactivity of laser cladding CaO–ZrO2–SiO2 system coatings on titanium alloy

A novel biphasic material has been synthesized from a melt-derived bioactive glass (45S5) and a glass-ceramic obtained from a melt-derived magnetic glass-ceramics for hyperthermia application. The biphasic material obtained from a mixture 1:1 of these components. The phase composition was investigated by XRD. The magnetic property was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. The glass-ceramic shows magnetic behavior and bioactive, useful for hyperthermia.

Download Full-text

Corrosion Behavior of a Ni–Cr–Mo Alloy Coating Fabricated by Laser Cladding in a Simulated Sulfuric Acid Dew Point Corrosion Environment

Coatings ◽

10.3390/coatings10090849 ◽

2020 ◽

Vol 10 (9) ◽

pp. 849

Author(s):

Chao Zheng ◽

Zongde Liu ◽

Shanshan Chen ◽

Congcong Liu

Keyword(s):

Solid Solution ◽

Corrosion Resistance ◽

Titanium Alloy ◽

Phase Composition ◽

Sulfuric Acid ◽

Corrosion Behavior ◽

Laser Cladding ◽

Intergranular Corrosion ◽

Alloy Coating ◽

Dew Point

For this study, aimed at proposing a potential direction to prevent sulfuric acid dew point corrosion, a Ni–Cr–Mo alloy Hastelloy C22 coating was fabricated by coaxial laser cladding technology. The phase composition, microstructure, and corrosion behavior in a simulated sulfuric acid dew point corrosion environment were investigated and compared with a Hastelloy C22 alloy, a titanium alloy TC4, and 09CrCuSb steel (ND). The results showed that the phase composition of the C22 coating is essentially similar to that of the C22 alloy, consisting of a γ-Ni solid solution and Ni6Mo6C1.06. The finer microstructure of the C22 coating mainly contains eutectic and dentrite, presenting a typical solidification feature of laser cladding. The corrosion resistance of the C22 coating is very close to that of the C22 alloy, and outclasses that of TC4 and ND. The corrosion behavior of the C22 coating is intergranular corrosion resulting from the segregation of molybdenum, chromium containing corrosion products, and smaller anode micro-batteries.

Download Full-text

Surface Properties and In Vitro Bioactivity of Fluorapatite/TiO2 Coatings Deposited on Ti Substrates by Nd:YAG Laser Cladding

Journal of Medical and Biological Engineering ◽

10.1007/s40846-015-0048-1 ◽

2015 ◽

Vol 35 (3) ◽

pp. 357-366 ◽

Cited By ~ 3

Author(s):

Chi-Sheng Chien ◽

Yu-Sheng Ko ◽

Tsung-Yuan Kuo ◽

Tze-Yuan Liao ◽

Huan-Chang Lin ◽

...

Keyword(s):

Surface Properties ◽

Laser Cladding ◽

Nd:Yag Laser ◽

In Vitro Bioactivity ◽

Tio2 Coatings

Download Full-text

Temulawak (Curcuma xanthorrhizaRoxb.) belongs to the family Zingiberaceae, has been empirically used as herbal medicines. The research was aimed to evaluate three promising lines of Temulawak based on their high bioactive contents (xanthorrhizol and curcuminoid) and its in vitro bioactivity (antioxidant and toxicity), and to obtain information on agrobiophysic environmental condition which produced high bioactive compounds. The xanthorrhizol and curcuminoid contents were measured by HPLC. In vitro antioxidant and toxicity were determined by DPPH (1,1-diphenyl-2-picryl-hydrazyl) method and BSLT (Brine Shrimp Lethality Test). The result showed that promising line A produced the highest yield of bioactive and bioactivity, i.e. 0.157 and 0.056 g plant-1of xanthorrizol and curcuminoid respectively. The IC50 of antioxidant activity was 65.09 mg L-1and LC50of toxicity was 69.05 mg L-1. In this study, Cipenjo had the best temulawak performance than two other locations. According to the agrobiophysic parameters, Cipenjo environmental condition was suitable for temulawak cultivation with temperature 28-34 ºC, rainfall ± 223.97 mm year-1 and sandy clay soil. Keywords: antioxidant, curcuminoid, promising lines, temulawak, xanthorrhizol

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) ◽

10.24831/jai.v40i2.6383 ◽

1970 ◽

Vol 40 (2) ◽

Author(s):

Waras Nurcholis ◽

Edy Djauhari Purwakusumah ◽

Mono Rahardjo ◽

Latifah K. Darusman

Keyword(s):

Antioxidant Activity ◽

Bioactive Compounds ◽

Brine Shrimp ◽

Clay Soil ◽

Herbal Medicines ◽

Environmental Condition ◽

In Vitro Bioactivity ◽

The Family ◽

Promising Line

Temulawak (Curcuma xanthorrhizaRoxb.) belongs to the family Zingiberaceae, has been empirically used as herbal medicines. The research was aimed to evaluate three promising lines of Temulawak based on their high bioactive contents (xanthorrhizol and curcuminoid) and its in vitro bioactivity (antioxidant and toxicity), and to obtain information on agrobiophysic environmental condition which produced high bioactive compounds. The xanthorrhizol and curcuminoid contents were measured by HPLC. In vitro antioxidant and toxicity were determined by DPPH (1,1-diphenyl-2-picryl-hydrazyl) method and BSLT (Brine Shrimp Lethality Test). The result showed that promising line A produced the highest yield of bioactive and bioactivity, i.e. 0.157 and 0.056 g plant-1of xanthorrizol and curcuminoid respectively. The IC50 of antioxidant activity was 65.09 mg L-1and LC50of toxicity was 69.05 mg L-1. In this study, Cipenjo had the best temulawak performance than two other locations. According to the agrobiophysic parameters, Cipenjo environmental condition was suitable for temulawak cultivation with temperature 28-34 ºC, rainfall ± 223.97 mm year-1 and sandy clay soil. Keywords: antioxidant, curcuminoid, promising lines, temulawak, xanthorrhizol

Download Full-text