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Design and development of novel MRI compatible zirconium- ruthenium alloys with ultralow magnetic susceptibility.

Li HF, Zhou FY, Li L, Zheng YF - Sci Rep (2016)

Bottom Line: The results demonstrated that alloying with ruthenium into pure zirconium would significantly increase the strength and hardness properties.The corrosion resistance of zirconium-ruthenium alloys increased significantly.Compared with conventional biomedical 316L stainless steel, Co-Cr alloys and Ti-based alloys, the magnetic susceptibilities of the zirconium-ruthenium alloys (1.25 × 10(-6) cm(3)·g(-1)-1.29 × 10(-6) cm(3)·g(-1) for zirconium-ruthenium alloys) are ultralow, about one-third that of Ti-based alloys (Ti-6Al-4V, ~3.5 × 10(-6) cm(3)·g(-1), CP Ti and Ti-6Al-7Nb, ~3.0 × 10(-6) cm(3)·g(-1)), and one-sixth that of Co-Cr alloys (Co-Cr-Mo, ~7.7 × 10(-6) cm(3)·g(-1)).

View Article: PubMed Central - PubMed

Affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.

ABSTRACT
In the present study, novel MRI compatible zirconium-ruthenium alloys with ultralow magnetic susceptibility were developed for biomedical and therapeutic devices under MRI diagnostics environments. The results demonstrated that alloying with ruthenium into pure zirconium would significantly increase the strength and hardness properties. The corrosion resistance of zirconium-ruthenium alloys increased significantly. High cell viability could be found and healthy cell morphology observed when culturing MG 63 osteoblast-like cells and L-929 fibroblast cells with zirconium-ruthenium alloys, whereas the hemolysis rates of zirconium-ruthenium alloys are <1%, much lower than 5%, the safe value for biomaterials according to ISO 10993-4 standard. Compared with conventional biomedical 316L stainless steel, Co-Cr alloys and Ti-based alloys, the magnetic susceptibilities of the zirconium-ruthenium alloys (1.25 × 10(-6) cm(3)·g(-1)-1.29 × 10(-6) cm(3)·g(-1) for zirconium-ruthenium alloys) are ultralow, about one-third that of Ti-based alloys (Ti-6Al-4V, ~3.5 × 10(-6) cm(3)·g(-1), CP Ti and Ti-6Al-7Nb, ~3.0 × 10(-6) cm(3)·g(-1)), and one-sixth that of Co-Cr alloys (Co-Cr-Mo, ~7.7 × 10(-6) cm(3)·g(-1)). Among the Zr-Ru alloy series, Zr-1Ru demonstrates enhanced mechanical properties, excellent corrosion resistance and cell viability with lowest magnetic susceptibility, and thus is the optimal Zr-Ru alloy system as therapeutic devices under MRI diagnostics environments.

No MeSH data available.


Related in: MedlinePlus

Microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys (⋆indicating p < 0.001 when comparing with pure Zr).
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f4: Microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys (⋆indicating p < 0.001 when comparing with pure Zr).

Mentions: Figure 4 showed the microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys. It can be seen that after adding the alloying element Ru, the microhardness of Zr was enhanced obviously. Both the trends of the as-cast (a) and annealed (b) alloys are consistent with the corresponding tensile test results. For the as-cast alloys, the trend is in the parabola type, with the Zr–3Ru alloy having the highest microhardness(493 kg/mm2). For the as-annealed alloys, the trend is a monotonicity rise, which results in Zr–5Ru alloy having the highest microhardnesss.


Design and development of novel MRI compatible zirconium- ruthenium alloys with ultralow magnetic susceptibility.

Li HF, Zhou FY, Li L, Zheng YF - Sci Rep (2016)

Microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys (⋆indicating p < 0.001 when comparing with pure Zr).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4836298&req=5

f4: Microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys (⋆indicating p < 0.001 when comparing with pure Zr).
Mentions: Figure 4 showed the microhardness of as-cast (a) and annealed (b) pure Zr and Zr–Ru alloys. It can be seen that after adding the alloying element Ru, the microhardness of Zr was enhanced obviously. Both the trends of the as-cast (a) and annealed (b) alloys are consistent with the corresponding tensile test results. For the as-cast alloys, the trend is in the parabola type, with the Zr–3Ru alloy having the highest microhardness(493 kg/mm2). For the as-annealed alloys, the trend is a monotonicity rise, which results in Zr–5Ru alloy having the highest microhardnesss.

Bottom Line: The results demonstrated that alloying with ruthenium into pure zirconium would significantly increase the strength and hardness properties.The corrosion resistance of zirconium-ruthenium alloys increased significantly.Compared with conventional biomedical 316L stainless steel, Co-Cr alloys and Ti-based alloys, the magnetic susceptibilities of the zirconium-ruthenium alloys (1.25 × 10(-6) cm(3)·g(-1)-1.29 × 10(-6) cm(3)·g(-1) for zirconium-ruthenium alloys) are ultralow, about one-third that of Ti-based alloys (Ti-6Al-4V, ~3.5 × 10(-6) cm(3)·g(-1), CP Ti and Ti-6Al-7Nb, ~3.0 × 10(-6) cm(3)·g(-1)), and one-sixth that of Co-Cr alloys (Co-Cr-Mo, ~7.7 × 10(-6) cm(3)·g(-1)).

View Article: PubMed Central - PubMed

Affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.

ABSTRACT
In the present study, novel MRI compatible zirconium-ruthenium alloys with ultralow magnetic susceptibility were developed for biomedical and therapeutic devices under MRI diagnostics environments. The results demonstrated that alloying with ruthenium into pure zirconium would significantly increase the strength and hardness properties. The corrosion resistance of zirconium-ruthenium alloys increased significantly. High cell viability could be found and healthy cell morphology observed when culturing MG 63 osteoblast-like cells and L-929 fibroblast cells with zirconium-ruthenium alloys, whereas the hemolysis rates of zirconium-ruthenium alloys are <1%, much lower than 5%, the safe value for biomaterials according to ISO 10993-4 standard. Compared with conventional biomedical 316L stainless steel, Co-Cr alloys and Ti-based alloys, the magnetic susceptibilities of the zirconium-ruthenium alloys (1.25 × 10(-6) cm(3)·g(-1)-1.29 × 10(-6) cm(3)·g(-1) for zirconium-ruthenium alloys) are ultralow, about one-third that of Ti-based alloys (Ti-6Al-4V, ~3.5 × 10(-6) cm(3)·g(-1), CP Ti and Ti-6Al-7Nb, ~3.0 × 10(-6) cm(3)·g(-1)), and one-sixth that of Co-Cr alloys (Co-Cr-Mo, ~7.7 × 10(-6) cm(3)·g(-1)). Among the Zr-Ru alloy series, Zr-1Ru demonstrates enhanced mechanical properties, excellent corrosion resistance and cell viability with lowest magnetic susceptibility, and thus is the optimal Zr-Ru alloy system as therapeutic devices under MRI diagnostics environments.

No MeSH data available.


Related in: MedlinePlus