Exploration of ceramic binder diamond aggregated abrasives
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摘要: 细粒度金刚石微粉大量积压是目前金刚石微粉制造行业面临的问题之一,为促进其应用,以铝硼硅结合剂为黏接剂、Si粉和Ti粉为添加剂制造团聚磨料试样,并将制成的团聚磨料加入铝硼硅结合剂中制成陶瓷结合剂试样,对所制试样的抗弯强度、物相构成和微观形貌进行分析。结果表明:添加Si或Ti的铝硼硅黏结剂均能起到团聚金刚石的作用;当团聚磨料中Si或Ti的质量分数为10.0%时,所制得的陶瓷结合剂试样抗弯强度最大,且添加Si的团聚磨料试样抗弯强度为43.74 MPa;当Si或Ti的质量分数超过10.0%时,团聚磨料试样中出现大量Si或者TiO2峰,其抗弯强度急剧下降;添加Si的团聚磨料试样与添加Ti的团聚磨料试样相比,其具有更大的粒度和更均匀的粒度分布,添加Si的铝硼硅黏结剂可将1~2 μm的磨料团聚为5~10 μm的磨料。Abstract: The diamond powder manufacturing industry at present grapples with a large backlog of fine-grained diamond powders. To enhance its applicability, agglomerated abrasive samples were manufactured with aluminum-borosilicate binder as the bonding agent, Si powder and Ti powder as additives. These agglomerated abrasive samples were then added into an aluminum-borosilicate binder to create ceramic bond samples. The bending strength, phase composition, and microscopic morphology of the samples were analyzed. The results show that the Al-B-Si binder, when combined with Si or Ti, can agglomerate diamond. When the mass fraction of Si or Ti in the agglomerated abrasives is 10.0%, the bending strength of the ceramic bond samples prepared is the largest. The bending strength of the agglomerated abrasive sample with Si added is 43.74 MPa. When the mass fraction of Si or Ti exceeds 10.0%, a large number of Si or TiO2 peaks appear in the agglomerated abrasive samples, and its bending strength decreases sharply. Compared with the agglomerated abrasive sample added with Ti, the agglomerated abrasive sample added with Si has a larger particle size and a more uniform particle size distribution. 1~2 μm abrasives can be aggregated into 5~10 μm abrasives with the addition of Al-B-Si binder with Si.
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表 1 实验设备
Table 1. Experimental equipments
实验仪器及设备 型号 生产厂家 放电等离子烧结炉 SPS-40-10 上海皓越 马弗炉 SX 2-4-10 上海意丰 X射线衍射仪 UITIMA IV 日本理学Rigaku 扫描电子显微镜 Inspect S50 FEI 万能材料试验机 Ae-20I 日本岛津公司 行星式球磨机 XM-4×05 湘潭华丰仪器 表 2 团聚磨料试样配方
Table 2. Formula of agglomerated abrasive samples
试样编号 Al2O3
质量分数
ω1 / %SiO2
质量分数
ω2 / %B2O3
质量分数
ω3 / %无水Na2CO3
质量分数
ω4 / %无水K2CO3
质量分数
ω5 / %Si
质量分数
ω6 / %Ti
质量分数
ω7 / %金刚石
体积分数
φ1 / %1 17.4 26.1 43.5 4.0 4.0 5.0 60 2 16.4 24.6 41.0 4.0 4.0 10.0 60 3 15.4 23.1 38.5 4.0 4.0 15.0 60 4 14.4 21.6 36.0 4.0 4.0 20.0 60 5 17.4 26.1 43.5 4.0 4.0 5.0 60 6 16.4 24.6 41.0 4.0 4.0 10.0 60 7 15.4 23.1 38.5 4.0 4.0 15.0 60 8 14.4 21.6 36.0 4.0 4.0 20.0 60 表 3 陶瓷结合剂试样配方
Table 3. Ceramic bonder sample formula
组成 取值 Al2O3 ω1 / % 18.4 SiO2 ω2 / % 27.6 B2O3 ω3 / % 46.0 无水Na2CO3 ω4 / % 4.0 无水K2CO3 ω5 / % 4.0 团聚磨料体积分数 φ2 / % 40 -
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