Comparative Experimental Study on Micro-grinding Performance of 2.5D Cf/SiC Composites and SiC Ceramics

doi:10.12068/j.issn.1005-3026.2025.20230206

Abstract

Abstract:

In order to explore the micro‑grinding process of 2.5D C_f/SiC composites and SiC ceramics， the differences of surface morphology， surface roughness and grinding force between the two materials under the same process parameters were compared， and the influence of process parameters on grinding performance evaluation parameters was analyzed. Single‑factor micro‑grinding experiments were carried out on the two materials by using 500# electroplated diamond micro‑grinding tools with the diameter of 0.9 mm. The results showed that the removal process of 2.5D C_f/SiC composites is different from that of SiC ceramics because the composites effectively inhibit the propagation of cracks during micro‑grinding. Under the same process parameters， 2.5D C_f/SiC composites have better surface micro‑morphology， fewer defects and less surface roughness， while SiC ceramics without fiber reinforcement have worse surface micro‑morphology， more defects and greater surface roughness. The average grinding force of SiC ceramics is more than 2.5D C_f/SiC， and the real‑time grinding force signal of 2.5D C_f/SiC is relatively stable during micro‑grinding， while the real‑time grinding force signal of SiC ceramics has spikes.

Key words: 2.5D C_f/SiC composite, SiC ceramics, micro?grinding process, surface morphology, surface roughness, grinding force

CLC Number:

TH 161

Ya-dong GONG, Yuan-feng LI, Quan WEN, Qi-zhen REN. Comparative Experimental Study on Micro-grinding Performance of 2.5D C_f/SiC Composites and SiC Ceramics[J]. Journal of Northeastern University(Natural Science), 2025, 46(1): 52-60.

Figures/Tables 14

References 13

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参数	2.5D C_f/SiC	SiC陶瓷
抗拉强度/MPa	280	441
抗弯强度/MPa	220	500
断裂韧性/(MPa·m^1/2)	20.2~31.0	3.0~3.5
密度/(g·cm^-3)	2.0	3.1
纤维直径/μm	7	—
纤维体积分数/%	37	—

参数	2.5D C_f/SiC	SiC陶瓷
抗拉强度/MPa	280	441
抗弯强度/MPa	220	500
断裂韧性/(MPa·m^1/2)	20.2~31.0	3.0~3.5
密度/(g·cm^-3)	2.0	3.1
纤维直径/μm	7	—
纤维体积分数/%	37	—

因素	水平
因素	1	2	3
磨削速度v_s/（m·s^-1）	0.471，0.942，1.414，1.885，2.356	1.414	1.414
磨削深度a_p/μm	9	3，6，9，12，15	9
进给速度v_w/（μm·s^-1）	120	120	20，70，120，170，220

因素	水平
因素	1	2	3
磨削速度v_s/（m·s^-1）	0.471，0.942，1.414，1.885，2.356	1.414	1.414
磨削深度a_p/μm	9	3，6，9，12，15	9
进给速度v_w/（μm·s^-1）	120	120	20，70，120，170，220

试验序号	工艺参数			2.5D C_f/SiC			SiC陶瓷
试验序号	v_s/(m·s^-1)	a_p/μm	v_w/(μm·s^-1)	F_n/N	F_t/N	R_a/μm	F_n/N	F_t/N	R_a/μm
1	0.471	9	120	1.223	0.980	1.004	1.407	1.146	1.235
2	0.942	9	120	0.958	0.778	0.921	1.219	0.967	1.074
3	1.414	9	120	0.627	0.511	0.805	0.984	0.839	0.927
4	1.885	9	120	0.496	0.366	0.663	0.767	0.657	0.846
5	2.356	9	120	0.385	0.294	0.587	0.619	0.526	0.690
6	1.414	3	120	0.293	0.222	0.501	0.525	0.411	0.638
7	1.414	6	120	0.394	0.303	0.622	0.748	0.634	0.792
8	1.414	9	120	0.627	0.511	0.805	0.984	0.839	0.927
9	1.414	12	120	0.873	0.657	0.916	1.289	1.046	1.106
10	1.414	15	120	1.122	0.888	1.102	1.513	1.206	1.356
11	1.414	9	20	0.337	0.269	0.632	0.594	0.475	0.747
12	1.414	9	70	0.428	0.382	0.729	0.767	0.642	0.852
13	1.414	9	120	0.627	0.511	0.805	0.984	0.839	0.927
14	1.414	9	170	0.756	0.597	0.922	1.094	0.956	0.989
15	1.414	9	220	0.852	0.685	0.985	1.209	1.035	1.020